CN107102771B - Touch display panel, display device and method for manufacturing touch display panel - Google Patents
Touch display panel, display device and method for manufacturing touch display panel Download PDFInfo
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- CN107102771B CN107102771B CN201710270266.1A CN201710270266A CN107102771B CN 107102771 B CN107102771 B CN 107102771B CN 201710270266 A CN201710270266 A CN 201710270266A CN 107102771 B CN107102771 B CN 107102771B
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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
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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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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Abstract
The application discloses a touch display panel, a display device and a method for manufacturing the touch display panel. The application provides a touch display panel includes: a display panel; the touch screen comprises a cover plate, a touch screen and a touch screen, wherein the cover plate comprises a top surface for providing touch control and a bottom surface opposite to the top surface, and the top surface comprises a plane area and an arc area surrounding the plane area; the bottom surface includes attached area and the attached area of non-of surrounding attached area, and display panel attaches in the apron in attached area, and the bottom surface still is provided with the recess, and the recess is located the attached area of non-partially at least. The application provides a touch-control display panel and display device sets up the recess through the bottom surface at the apron, has increased the deformation volume that the apron received the user after pressing, has improved touch-control display panel's pressure detection semaphore, makes pressure detection become sensitive, has promoted the user experience of user to the pressure detection function.
Description
Technical Field
The present invention generally relates to the field of display technologies, and in particular, to a touch display panel, a display device, and a method for manufacturing a touch display panel.
Background
With the continuous development of display technologies, the application of touch display panels is more and more extensive, and the requirements of users on the functions and the appearance of the touch display panels are more and more diversified. To meet this demand of users, touch display panel applications incorporating pressure detection functions have come to be used.
In the prior art, a pressure detection function is generally integrated in a touch display panel by providing a first electrode layer in the display panel, and using a backlight bezel in a backlight module of the touch display panel as a second electrode layer, because a deformable layer is provided between the display panel and the backlight module, when a user applies pressure on a top surface of a cover plate included in the touch display panel, a height of the deformable layer between the first electrode layer and the second electrode layer changes, so that a capacitance value of a capacitor formed by the first electrode layer and the second electrode layer changes correspondingly, and further a capacitance value change amount of the capacitor formed by the first electrode layer and the second electrode layer can be converted into a pressure value applied on the top surface of the cover plate by the user, so as to implement the pressure detection function.
However, as the popularity of the light and thin touch display panel in the market is increasing, the height of the deformable layer between the display panel and the backlight module is made smaller and smaller, so that the feasible variable between the first electrode layer and the second electrode layer for implementing the pressure detection function is made smaller and smaller, and when the feasible variable between the first electrode layer and the second electrode layer is smaller, and a user applies pressure on the top surface of the cover plate, the capacitance variation of the capacitor formed by the first electrode layer and the second electrode layer is smaller, resulting in a smaller pressure detection signal amount.
Therefore, a touch display panel capable of increasing the amount of the pressure detection signal is needed.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a touch display panel to solve the technical problems in the prior art.
In a first aspect, the present application provides a touch display panel, including:
a display panel;
the touch screen comprises a cover plate, a touch screen and a touch screen, wherein the cover plate comprises a top surface for providing touch control and a bottom surface opposite to the top surface, and the top surface comprises a plane area and an arc area surrounding the plane area; the bottom surface includes attached area and the attached area of non-of encircleing attached area, and display panel attaches in the apron in attached area, and the bottom surface still is provided with the recess, and the recess is at least partly located the attached area of non-.
In a second aspect, the present application provides a display device, which includes the touch display panel provided in the first aspect.
In a third aspect, the present application provides a method for manufacturing the touch display panel provided in the first aspect.
The application provides a touch-control display panel, display device and preparation touch-control display panel's method, satisfying both that promotion user experience and product are pleasing to the eye, when guaranteeing the intensity of consumer electronics product (cell-phone, flat board etc.), through set up the recess in the bottom surface of apron, the deformation volume after the apron receives the user and presses has been increased, thereby realized promoting the purpose of pressure detection semaphore, and then avoid appearing the user and need exert great pressure and just can reach the signal threshold value that triggers the pressure detection function or the problem that trigger the threshold value between the pressure detection function at different levels comparatively is close, user experience to the pressure detection function of user has been promoted. And through set up the recess in the bottom surface of apron, alleviateed touch-control display panel's weight, promoted user experience.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a comparison diagram of deformation amounts and capacitance changes of cover plates of different touch display panels;
FIG. 2 is a schematic cross-sectional view of a touch display panel according to an embodiment of the invention;
FIG. 3 is a schematic diagram illustrating a cover structure of the touch display panel shown in FIG. 2;
FIG. 4 is a schematic top view of the cover plate of the touch display panel of FIG. 2 from the top surface of the cover plate;
FIG. 5 is a schematic top view of the cover plate of the touch display panel of FIG. 2 from the bottom of the cover plate;
FIGS. 5a and 5b are schematic cross-sectional views along AA 'and BB' of the embodiment of FIG. 5;
FIG. 6a is a schematic diagram of another embodiment from a bottom view of a cover plate;
FIGS. 6b and 6c are schematic cross-sectional views along AA 'and BB', respectively, of the embodiment of FIG. 6 a;
FIG. 7a is a schematic diagram of a further embodiment viewed from the bottom of the cover;
FIG. 7b is a schematic cross-sectional view along AA' of the embodiment of FIG. 7 a;
FIG. 8 is a schematic diagram of a capacitor formed by the touch display panel according to yet another embodiment;
fig. 9 is a schematic diagram of a capacitor formed by a touch display panel according to still another embodiment of the present application;
FIG. 10 is a schematic view of a display device provided in the present application;
FIG. 11 is a schematic cross-sectional view of a substrate provided herein;
FIG. 12a is a schematic cross-sectional view of a substrate according to yet another embodiment of the present application;
FIG. 12b is a schematic top view of the embodiment of FIG. 12a with the first substrate attached to it from the second surface;
FIG. 12c is a schematic cross-sectional view of the embodiment of FIG. 12 b;
fig. 13 is a schematic cross-sectional view illustrating a cover plate of a touch display panel according to still another embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 2 is a schematic cross-sectional view of a touch display panel according to an embodiment of the invention, fig. 3 is a schematic structural view of a cover plate of the touch display panel shown in fig. 2, fig. 4 is a schematic top view of the cover plate included in the touch display panel shown in fig. 2 from a top surface of the cover plate, fig. 5 is a schematic top view of the cover plate included in the touch display panel shown in fig. 2 from a bottom surface of the cover plate, referring to fig. 2, fig. 3, fig. 4 and fig. 5, the touch display panel provided in the embodiment of the invention includes a display panel 20 and a cover plate 10, wherein the cover plate 10 includes a top surface 11 providing touch control and a bottom surface 12 opposite to the top surface 11, the top surface 11 includes a planar area P and an arc-shaped; the bottom surface 12 includes an attachment region T and a non-attachment region F surrounding the attachment region T, the display panel 20 is attached to the cover plate 10 in the attachment region T, the bottom surface 12 is further provided with a groove 13, and at least part of the groove 13 is located in the non-attachment region F.
As described in the background art, as the light and thin touch display panel is increasingly popular in the market, the height of the deformable layer between the display panel and the backlight module is reduced, and the capacitance variation of the capacitor formed by the first electrode layer and the second electrode layer is reduced. And, the user has higher and higher requirements for the visual effect and the hand feeling of the whole body of the screen and the machine body, and the thickness of the cover plate of the touch display panel is correspondingly increased. When the thickness of the touch display panel is increased, as shown in fig. 1, when the thickness of the cover plate 02 is greater than that of the cover plate 01, not only the height change of the deformable layer is smaller, but also when a user applies a pressure F1 with the same magnitude, the deformation of the cover plate 02 in the direction perpendicular to the touch display panel is smaller than that of the cover plate 01, that is, Δ d2< Δ d1, so that the capacitance variation of the capacitor formed by the first electrode layer and the second electrode layer is smaller, which brings a great limitation to the application of the pressure detection function, and a problem that the user needs to apply a larger pressure to reach a signal threshold value for triggering the pressure detection function may occur; or when the pressure detection functions are classified more, the problem that the trigger threshold values among the pressure detection functions at all levels are closer is caused; both of these problems result in a poor user experience with the pressure detection functionality. The application provides a touch-control display panel, display device and method of preparation touch-control display panel, satisfying both and promoting user experience and product pleasing to the eye, when guaranteeing the intensity of consumer electronics product (cell-phone, flat board etc.), through set up the recess in the bottom surface of apron, the deformation volume after the apron receives the user and presses has been increased, thereby realized promoting the purpose of pressure detection semaphore, and then avoid appearing the user and need exert great pressure and just can reach the signal threshold value that triggers the pressure detection function or the problem that trigger the threshold value between the pressure detection function at different levels comparatively is close, user experience to the pressure detection function of user has been promoted. And through set up the recess in the bottom surface of apron, alleviateed touch-control display panel's weight, promoted user experience.
In addition to the same portions as those in the other embodiments provided in the present invention, the cover plate 10 may include two first grooves 13, and referring to fig. 2 and 5, the two first grooves 13 are located on two opposite sides of the display surface 20.
Fig. 6a, 6b, and 6c show schematic diagrams of a cover plate viewed from a bottom surface of the touch display panel, and fig. 6b and 6c show schematic diagrams of cross sections of the touch display panel along AA 'and BB' respectively, except for the same portions as those in other embodiments of the present invention, the cover plate 10 includes a circular groove 13 surrounding the attachment region T.
Optionally, as shown in fig. 5, fig. 5a, fig. 5b, fig. 6b, and fig. 6c, the orthographic projection of the display panel 20 on the top surface 11 coincides with the orthographic projection of the attachment area T on the top surface 11, that is, the orthographic projection of the display panel 20 on the top surface 11 is equal to the orthographic projection area of the attachment area T on the top surface 11, and no step area is provided between the display panel 20 and the cover plate 10, so that when the touch display panel is pressed by a roller in the manufacturing process, there is no boundary area where stress is sharply increased, and thus the risk of cracking and crushing of the display panel 20 is reduced, and the product effect of the touch display panel is improved.
The cover plate provided by the above embodiments includes grooves in the non-attachment region, as shown in fig. 5 and 6 a. Of course, a part of the groove included in the cover plate provided in the embodiment of the present invention may also be located in the attachment region, and another part of the groove may be located in the non-attachment region. For example, as shown in fig. 7a and 7b, fig. 7a shows a schematic top view of a cover plate of a further embodiment, and fig. 7b shows a schematic cross-sectional view of a touch display panel along AA', except for the same parts as those of the other embodiments provided by the present invention, an orthogonal projection of the groove 13 on the top surface 11 of the cover plate 10 covers an orthogonal projection of the attachment region T on the top surface 11, that is, as shown in fig. 7b, an area of the orthogonal projection of the groove 13 on the top surface 11 is larger than an orthogonal projection of the attachment region T on the top surface 11, and a gap exists between a peripheral edge of the groove 13 and the display panel 20. The touch display panel that this application embodiment provided sets up recess 13 through lapping 10 bottom surface 12, and display panel 20 is located recess 13, has not only increased the deformation volume that the apron 10 received the user to press back, has improved pressure detection semaphore, but also has reduced display panel 20 and has received electrostatic interference's risk. Because the cover plate 10 is not a conductor, when static electricity is applied to the touch display panel, the generated current will automatically flow to the conductive medium, and by disposing the groove 13 on the bottom surface 12 of the cover plate 10, as shown in fig. 7b, the display panel 20 is covered in the cover plate 10, that is, the periphery of the display panel 20 is covered by the protrusion structure a of the cover plate, in the process of conducting the current downwards, the protrusion structure a of the cover plate 10 plays a role in blocking, and the current is not easily conducted to the display panel 20 along the direction of the cover plate 10 because the cover plate 10 is not conductive.
The touch display panel provided by the embodiment has the advantages that the grooves are formed in the bottom surface of the cover plate, so that the weight of the touch display panel is reduced, and the user experience is improved. However, in order to ensure the rigidity and rigidity of the cover plate at the corresponding position of the cover plate groove, as shown in fig. 6c, the thickness H1 of the cover plate at the corresponding position of the groove is optionally greater than or equal to 0.5mm, for example, 0.5mm,0.55 mm. Alternatively, the thickness H2 of the cover plate, i.e., the vertical distance between the top surface 11 and the bottom surface 12 of the cover plate 10, may be 0.7mm or more.
Optionally, as shown in fig. 8, the touch display panel further includes a backlight module 30 disposed opposite to the display panel 20, and the display panel 20 is located between the cover plate 10 and the backlight module 30; the display panel 20 includes a first electrode layer 21; the backlight module 30 includes a second electrode layer 31; the pressure detection is performed based on the capacitance change amount of the capacitance formed by the first electrode layer 21 and the second electrode layer 31. Before the touch display panel is pressed by a user, the capacitance value of the capacitor formed by the first electrode layer 21 and the second electrode layer 31 is equal to
Where ∈ represents a dielectric constant between the first electrode layer 21 and the second electrode layer, S represents a facing area of the first electrode layer 41 and the second electrode layer 42, k represents a static electricity constant, and D represents a vertical distance between the first electrode layer 41 and the second electrode layer 42. When a user presses the touch display panel with a finger, the capacitance of the capacitor formed by the first electrode layer 21 and the second electrode layer 31 is equal to
Wherein D1 represents the touch display panel pressed by the userThe vertical distance between the first electrode layer 21 and the second electrode layer 31. Before and after the touch display panel is pressed, the capacitance variation of the capacitance formed by the first electrode layer 21 and the second electrode layer 31 of the touch display panel
By forming the thinned region by providing the groove 13 on the cover plate 10, after being pressed by a user, the deformation amount of the cover plate becomes larger, that is, the deformation amount between the first electrode layer 21 and the second electrode layer 31 is also increased, that is, (D-D1) becomes larger, so that a larger capacitance variation amount, that is, a larger pressure detection signal amount can be obtained by applying the same force on the touch display panel by the user, compared with the prior art. Referring to table 1, table 1 shows the pressure value of 500g pressing applied to the center point of the touch display panel a (the cover plate is 0.7mm thick and is not provided with the groove) and the touch display panel B (the cover plate is 0.7mm thick and is provided with the groove) provided in the embodiment of the present application, and the pressure detection signal amount of the touch display panel a in the prior art is about 300 times smaller than that of the touch display panel B provided in the embodiment of the present application.
TABLE 1
The touch display panel provided by the embodiment of the application can reach the signal threshold value for triggering the pressure detection function without applying larger pressure, so that the pressure detection function is started; when the pressure detection functions are more classified (for example, the classification is divided into a light-press function and a heavy-press function, the light-press function is triggered when the pressure detection signal quantity is greater than a light-press threshold and less than a heavy-press threshold, and the heavy-press function is triggered when the pressure detection signal quantity is greater than a heavy-press threshold), the detected pressure detection signal quantity is improved, so that the problem that the trigger thresholds of all levels of pressure detection functions are closer is avoided, the probability that a user triggers the heavy-press function when the user wants to trigger the light-press function is reduced, and the user experience of the user on the pressure detection functions is improved.
Alternatively, as shown in fig. 8, the backlight module 30 includes a backlight bezel 36 and an optical stack structure 32 located on the side of the backlight module 30 facing the display panel 20, where the backlight bezel 36 is the second electrode layer 31; the optical stack structure 32 includes a reflective sheet 320, a light guide plate 321, a diffusion sheet 322 and at least one layer of light enhancement sheet 323 sequentially arranged in a direction from the backlight module 30 to the display panel 20; a gas layer 40 is provided between the optical stack 32 and the display panel 20.
Optionally, as shown in fig. 9, the capacitance diagram of the touch display panel according to the embodiment of the present invention may also be that the backlight module 30 is located on a side surface of the display panel 20 away from the cover plate, the structure of the backlight module 30 is similar to that of fig. 8, and the backlight module 30 also includes a backlight bezel 36, a reflective sheet, a light guide plate, a diffusion sheet, and at least one layer of brightness enhancement sheet, which are not described herein again, the backlight bezel 36 is the second electrode layer 31, the other electrode layer 51 is located on a side surface of the middle frame 52 close to the backlight module 30, and the variable layer 40 is formed between the electrode layer 51 and the second electrode layer 31.
Fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 10, the display device 400 includes the touch display panel in the above embodiments, and thus the display device 400 provided in the embodiment of the present invention also has the beneficial effects described in the above embodiments, which are not repeated herein. It should be noted that the display device 400 may be a mobile phone as shown in fig. 10, or may be a computer, a television, an intelligent wearable device, and the like, which is not limited in the embodiment of the present invention.
The invention also provides a method for manufacturing the touch display panel,
first, as shown in fig. 11, a substrate 110 is provided, the substrate 110 having a first surface 111 and a second surface 112 oppositely disposed;
second, the second surface 112 is machined by a numerical control machine or an etching process to form a groove, and a cover plate is formed. In one aspect, a numerically controlled machine tool (CNC) can support three-axis milling, turning, and wire-cutting NC machining, and can support wire-frame, curved, and solid geometry modeling. The grooves may be formed on the second surface 112 of the substrate 110 by solid surface machining (solid face ToolPath), solid area machining (solid area tool ToolPath), or the like. On the other hand, the etching process is mainly to remove the protective film of the area to be etched after exposure plate making and development, and contact chemical solution during etching to achieve the effect of dissolution and corrosion and form the effect of concave-convex or hollow molding. The etching process provided by the embodiment of the invention can sequentially comprise the following steps of: the method comprises the steps of firstly setting the sizes of a substrate and a groove according to product requirements, preparing the substrate, cleaning the substrate, drying the substrate, pasting or coating a film on the second surface of the substrate, drying, exposing, developing, drying, etching and demolding the second substrate. Wherein the necessary etching process steps are pasting or coating, exposing, developing, etching and demolding on the second surface of the substrate.
After forming the groove on the second surface 112 of the substrate 110 by the above numerical control machine or etching process, referring to fig. 3, a cover plate 10 may be formed, wherein the cover plate 10 includes a top surface 11 providing touch control and a bottom surface 12 opposite to the top surface 11, wherein the top surface 11 is a first surface 111; the top surface 11 includes a plane region P, and an arc region H surrounding the plane region P; the bottom surface 12 includes an attachment region T and a non-attachment region F surrounding the attachment region T. The cover plate 10 provided in the above embodiment may include the grooves 13 both located in the non-attachment region, as shown in fig. 5, the grooves 13 include two first grooves located at two opposite sides of the display panel 20 (refer to fig. 2); or as shown in fig. 6a, the groove 13 is an annular groove, which surrounds the attachment zone T. As shown in fig. 7a and 7b, the cover plate 10 provided in the embodiment of the present invention may also include a recess 13, a part of which is located in the attachment region T, and another part of which is located in the non-attachment region F. In summary, the cover plate 10 provided by the embodiment of the present invention includes the groove 13 at least partially located in the non-attachment region F.
Finally, a display panel 20 is provided, as shown in fig. 6b and fig. 7b, the display panel 20 is attached to the cover plate 10 in the attachment region T. Alternatively, as shown in fig. 6b, the orthographic projection of the display panel 20 on the top surface 11 coincides with the orthographic projection of the attachment area T on the top surface. Alternatively, as shown in fig. 7b, the orthographic projection of the groove 13 on the top surface 11 covers the orthographic projection of the attaching region T on the top surface 11, that is, the area of the orthographic projection of the groove 13 on the top surface 11 is larger than the orthographic projection of the attaching region T on the top surface 11, and a gap exists between the peripheral edge of the groove 13 and the display panel 20.
The embodiment of the invention also provides a method for manufacturing the touch display panel,
first, as shown in fig. 12a, a substrate 210 is provided, wherein the substrate 210 has a first surface 211 and a second surface 212 which are oppositely arranged;
next, fig. 12b shows a schematic plan view from the second surface of the substrate, fig. 12c shows a schematic cross-sectional view of the substrate, and referring to fig. 12b and 12c, a first substrate 220 is provided, and the first substrate 220 is attached to the second surface 212 by ion welding or chemical bonding, wherein the first substrate 220 is attached to all edge regions of the second surface 212. The number, shape and size of the first substrate 220 are not limited in the embodiment of the present application, for example, the first substrate 220 is also ring-shaped. After the first substrate 220 is attached to all edge regions of the second surface 212, as shown in fig. 12c, the first substrate 220 and the second surface 212 form a groove 13. The ion welding is to weld two pieces of glass together by using a high-temperature melting technology, and can be used for bonding optical glass containing silicon or other silicon glass. Chemical bonding refers to a process of applying a chemical binder to a web by dipping, spraying, foaming, printing, etc., using an emulsion or solution of the binder, and consolidating the matrix of fibers-web bond by heat treatment to form a nonwoven material.
Secondly, processing the outer contours of the substrate 210 and the first substrate 220 by a numerical control machine (CNC) process using a Profile Toolpath (Profile Toolpath) or a solid Profile Toolpath (solid Profile Toolpath) process to form an arc-shaped area, and forming a cover plate 10, referring to fig. 3, where the cover plate 10 includes a top surface 11 providing touch control and a bottom surface 12 opposite to the top surface 11, where the top surface 11 is a first surface 211; the top surface 11 includes a plane area P, and an arc area H surrounding the plane area P; the bottom surface 12 includes an attachment region T and a non-attachment region F surrounding the attachment region T.
Finally, a display panel 20 is provided, as shown in fig. 7a and 7b, the display panel 20 is attached to the cover plate 10 in the attachment region T, and a portion of the groove 13 included in the cover plate 10 provided in the embodiment of the present invention is located in the attachment region T, and another portion is located in the non-attachment region F, that is, only a portion of the groove 13 may be located in the non-attachment region T.
Optionally, as shown in fig. 13, the second surface 212 of the substrate 210 includes a bonding region N, wherein an orthogonal projection of the bonding region N on the first surface 211 overlaps an orthogonal projection of the attachment region T on the first surface 211, the first substrate 220 is also attached to the bonding region N on the second surface 212, and then the outer contours of the substrate 210 and the first substrate 220 are processed by a numerical control machine to form an arc-shaped region, so as to form the cover plate 10.
Optionally, as shown in fig. 6b and 6c, the orthographic projection of the display panel 20 on the top surface 11 coincides with the orthographic projection of the attachment area T on the top surface 11, that is, the orthographic projection of the display panel 20 on the top surface 11 is equal to the orthographic projection area of the attachment area T on the top surface 11, and no step area is arranged between the display panel 20 and the cover plate 10, so that in the process, when the roller presses the touch display panel, there is no boundary area where the stress is sharply increased, and then the risk of cracking and crushing of the display panel 20 is reduced, and the product effect of the touch display panel is improved.
The touch display panel manufactured by the embodiment has the advantages that the grooves are formed in the bottom surface of the cover plate, so that the weight of the touch display panel is reduced, and the user experience is improved. However, in order to ensure the rigidity and rigidity of the cover plate at the corresponding position of the cover plate groove, as shown in fig. 6c, the thickness H1 of the cover plate at the corresponding position of the groove is optionally greater than or equal to 0.5mm, for example, 0.5mm,0.55 mm. Alternatively, the thickness H2 of the cover plate, i.e., the vertical distance between the top surface 11 and the bottom surface 12 of the cover plate 10, may be 0.7mm or more.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in more detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (17)
1. A touch display panel, comprising:
a display panel;
the touch screen comprises a cover plate, a touch screen and a touch screen, wherein the cover plate comprises a top surface for providing touch control and a bottom surface opposite to the top surface, and the top surface comprises a plane area and an arc area surrounding the plane area; the bottom surface comprises an attaching area and a non-attaching area surrounding the attaching area, the display panel is attached to the cover plate in the attaching area, the bottom surface is also provided with a groove, and at least part of the groove is positioned in the non-attaching area;
the touch display panel further includes:
the backlight module is arranged opposite to the display panel, and the display panel is positioned between the cover plate and the backlight module;
the display panel includes a first electrode layer;
the backlight module comprises a second electrode layer;
after the touch display panel is pressed by a user, the cover plate deforms, and pressure detection is carried out according to the variation of the capacitance formed by the first electrode layer and the second electrode layer.
2. The touch display panel of claim 1, wherein the grooves comprise two first grooves located on opposite sides of the display panel.
3. The touch display panel of claim 1, wherein the groove is an annular groove surrounding the attachment area.
4. The touch display panel according to claim 2 or 3, wherein an orthogonal projection of the display panel on the top surface coincides with an orthogonal projection of the attachment area on the top surface.
5. The touch display panel of claim 1, wherein an orthographic projection of the groove on the top surface covers an orthographic projection of the attachment area on the top surface.
6. The touch display panel according to claim 1, wherein the thickness of the cover plate at the position corresponding to the groove is greater than or equal to 0.5 mm.
7. The touch display panel according to claim 6, wherein the backlight module comprises a backlight bezel and an optical stack structure located on a side of the backlight module facing the display panel, the backlight bezel being the second electrode layer;
the optical laminated structure comprises a reflecting sheet, a light guide plate, a diffusion sheet and at least one layer of brightness enhancement sheet which are sequentially arranged in the direction from the backlight module to the display panel;
a gas layer is arranged between the optical laminated structure and the display panel.
8. A display device, characterized in that the display device comprises the touch display panel of any one of claims 1 to 7.
9. A method for manufacturing a touch display panel is provided,
providing a substrate, wherein the substrate is provided with a first surface and a second surface which are oppositely arranged;
processing the second surface through a numerical control machine tool or an etching process to form a groove and form a cover plate, wherein the cover plate comprises a top surface for providing touch control and a bottom surface opposite to the top surface, and the top surface is the first surface; the top surface comprises a plane area and an arc area surrounding the plane area; the bottom surface comprises an attaching area and a non-attaching area surrounding the attaching area, and at least part of the groove is positioned in the non-attaching area;
providing a display panel, wherein the display panel is attached to the cover plate in the attaching area and comprises a first electrode layer;
and providing a backlight module, wherein the backlight module is opposite to the display panel, the display panel is positioned between the cover plate and the backlight module, the backlight module comprises a second electrode layer, the cover plate deforms after being pressed by a user, and pressure detection is carried out according to the variation of the capacitance formed by the first electrode layer and the second electrode layer.
10. The method of claim 9, wherein the grooves comprise two first grooves on opposite sides of the display panel.
11. The method of claim 10, wherein the groove is an annular groove that surrounds the landing zone.
12. The method of claim 11, wherein an orthographic projection of the display panel on the top surface coincides with an orthographic projection of the attachment region on the top surface.
13. The method of claim 9, wherein an orthographic projection of the recess on the top surface covers an orthographic projection of the affixion region on the top surface.
14. A method for manufacturing a touch display panel is provided,
providing a substrate, wherein the substrate is provided with a first surface and a second surface which are oppositely arranged;
providing a first substrate, and attaching the first substrate to the second surface by an ion welding or chemical bonding method, wherein the first substrate is attached to all edge areas of the second surface, and a groove is formed between the first substrate and the second surface;
processing the outer contours of the substrate and the first substrate through a numerical control machine tool to form an arc-shaped area and a cover plate, wherein the cover plate comprises a top surface for providing touch control and a bottom surface opposite to the top surface, and the top surface is the first surface; the arc-shaped area surrounds the plane area of the top surface, and the bottom surface is provided with an attaching area and a non-attaching area surrounding the attaching area;
providing a display panel, wherein the display panel is attached to the cover plate in the attaching area, one part of the groove is positioned in the non-attaching area, and the display panel comprises a first electrode layer;
and providing a backlight module, wherein the backlight module is opposite to the display panel, the display panel is positioned between the cover plate and the backlight module, the backlight module comprises a second electrode layer, the cover plate deforms after being pressed by a user, and pressure detection is carried out according to the variation of the capacitance formed by the first electrode layer and the second electrode layer.
15. The method of claim 14, wherein the second surface of the substrate comprises a bonded region, wherein an orthogonal projection of the bonded region on the first surface overlaps an orthogonal projection of the attachment region on the first surface, and wherein the first substrate is attached to the bonded region on the second surface.
16. The method of claim 15, wherein an orthographic projection of the display panel on the top surface coincides with an orthographic projection of the attachment region on the top surface.
17. The method of claim 14, wherein the substrate has a thickness of 0.5mm or greater.
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| CN109326220B (en) * | 2018-09-20 | 2021-06-29 | 云谷（固安）科技有限公司 | Cover plate and manufacturing method thereof, flexible display module and electronic equipment |
| CN112102723A (en) * | 2020-09-15 | 2020-12-18 | 京东方科技集团股份有限公司 | Display module, manufacturing method thereof and display device |
| CN116409261A (en) * | 2021-12-29 | 2023-07-11 | 奥托立夫开发公司 | Switch control device and steering wheel |
| CN116300174A (en) * | 2023-01-31 | 2023-06-23 | 厦门天马微电子有限公司 | Display module and display device |
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