Touch screen assembly with PMMA cover plate
By designing the avoidance area corresponding to the hollow hole on the PMMA cover plate and aligning with the edge of the PMMA cover plate, the problem of opening the edge of the PMMA cover plate when subjected to external force is solved, improving the yield and reliability of the touch screen, ensuring that The glue is not affected by the viewing area display.
Patent Information
- Application Number
- CN202420116615.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-17
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-17
AI Technical Summary
The existing PMMA cover plates are prone to deform when subjected to external forces, causing the edge to be glued. Because they are close to the viewing area, bubble problems are prone to occur, which affects the yield and reliability of the touch screen.
A touch screen assembly with PMMA cover is designed, the SENSOR glass substrate is bonded and connected to the PMMA cover. A through hollow hole is provided on the PMMA cover. The edge of the glass substrate body is equipped with an avoidance area. The area is larger than the hollow hole and is aligned with the edge of the PMMA cover plate to avoid the area where the mechanical key parts are not fitted and ensure that the glue is in the non-view area.
It greatly reduces the area where the PMMA cover is not fitted, improves the yield and reliability of the touch screen, reduces the risk of stressed glue opening at the edge, and prevents the glue opening from affecting the normal display of the viewing area.
Smart Images
Figure CN222189852U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a touch screen component, more specifically, to a touch screen component with a PMMA cover plate. Background Art
[0002] Since PMMA cover plates are not easy to break under external forces and produce very few fragments, they are much safer than glass materials. Therefore, some cars use PMMA cover plates as the cover material for display screens for safety reasons.
[0003] Since some display modules are designed with mechanical buttons, there will be a space on the cover, such as Figure 1 As shown, the sensor glass substrate 100 is bonded to the PMMA cover plate 200, and a hollow hole 210 is provided on the PMMA cover plate 200 for the mechanical button. In the existing design, the sensor glass is generally expanded beyond the viewing area because the hollowed-out part does not have a touch function. However, in this design, since the PMMA cover plate is not bonded in some places, when subjected to external force, the PMMA cover plate is easily deformed, resulting in debonding at the edge, and since it is close to the viewing area, it is easy to see bubbles in the viewing area.
[0004] Chinese invention patent document CN103336639A discloses a capacitive touch screen, comprising: a panel substrate with a transparent conductive coating, the panel substrate is an acrylic sheet PMMA, or the panel substrate is a composite material of polycarbonate PC and PMMA; insulating ink covering the panel substrate, the insulating ink forming a frame pattern outside the touch screen window; a sensor circuit printed on the transparent conductive coating for detecting the touch position; conductive ink covering the insulating ink and the transparent conductive coating at the same time, through which the transparent conductive coating is extended to the back of the insulating ink for circuit processing outside the window. The present invention also provides a capacitive touch screen, comprising: a top panel, a bottom sensor and an optical glue, the optical glue is located between the top panel and the bottom sensor, and is used to bond the top panel and the bottom sensor; wherein the top panel is an acrylic sheet PMMA, or the top panel is a composite material of polycarbonate PC and PMMA. The present invention also provides a capacitive touch screen, comprising: a top panel, a polyethylene terephthalate (PET) film and an optical glue, wherein the optical glue is located between the top panel and the PET film and is used to bond the top panel and the PET film; wherein the top panel is an acrylic plate (PMMA), or the top panel is a composite material of polycarbonate (PC) and PMMA. The touch screen also comprises: an insulating ink covering the panel substrate, the insulating ink forming a frame pattern outside the touch screen window; a sensor circuit printed on the transparent conductive coating for detecting the touch position; a conductive ink covering both the insulating ink and the transparent conductive coating, through which the transparent conductive coating is extended to the back of the insulating ink for circuit processing outside the window. In addition, a hole can be left on the insulating ink, and the insulating ink with the hole can be covered on the panel substrate to form a frame pattern outside the touch screen window; the conductive ink is printed on the portion where the hole is left, and the transparent conductive coating is extended to the back of the insulating ink for circuit processing outside the window. Alternatively, a whole line of conductive ink may be printed on the edge of the window, and the transparent conductive coating may be extended to the back of the insulating ink for circuit processing outside the window.
[0005] Obviously, the patent uses acrylic sheet PMMA or a composite material of polycarbonate PC and PMMA as the panel substrate, which is easier to cut and less likely to break, and can effectively improve the production efficiency of capacitive touch screens. This structure cannot solve the problem of debonding caused by deformation of the PMMA cover.
[0006] Chinese utility model patent document CN208569585U discloses a touch screen, comprising: a PMMA composite cover plate; an adhesive layer; a glass sensor layer; the light transmittance of the PMMA composite cover plate is less than 70%. The PMMA composite cover plate is a colored PMMA composite cover plate. The PMMA composite cover plate comprises: a PMMA cover plate; a first ink layer composited on the upper surface of the PMMA cover plate; and a second ink layer composited on the lower surface of the PMMA cover plate. The thickness of the PMMA cover plate is 0.7 to 2.0 mm. The first ink layer is a semi-transparent silk screen ink layer; the second ink layer is a semi-transparent silk screen ink layer. The thickness of the first ink layer is 5 to 15 μm; the thickness of the second ink layer is 5 to 15 μm. The light transmittance of the PMMA composite cover plate is 20% to 30%. The adhesive layer is an OCA optical adhesive layer or an OCR optical adhesive layer. The thickness of the adhesive layer is 0.125 to 0.2 mm. The thickness of the glass sensor layer is 0.55 to 1.1 mm.
[0007] Obviously, this patent obtains a touch screen with low light transmittance by compounding the adhesive layer with the glass sensor layer. This structure cannot solve the debonding problem caused by the deformation of the PMMA cover plate. Utility Model Content
[0008] Based on this, it is necessary to provide a touch screen assembly with a PMMA cover plate for the above technical problems. The touch screen assembly with a PMMA cover plate includes a PMMA cover plate and a SENSOR glass substrate. The SENSOR glass substrate is bonded and connected to the PMMA cover plate. The PMMA cover plate is provided with a through hollow hole. The SENSOR glass substrate includes a glass substrate body. The middle of the glass substrate body is provided with a visible area. The edge of the glass substrate body is provided with a plurality of avoidance areas. The positions of the avoidance areas correspond to the hollow holes one by one. The area of the avoidance areas is larger than the hollow holes. Since the area of the avoidance areas is larger than the hollow holes, and the edges of the avoidance areas are aligned with the edges of the PMMA cover plate, the mechanical button parts are avoided. After bonding, the area where PMMA is not bonded can be greatly reduced. Even if the edge of the PMMA cover plate is debonded when it is subjected to force, it is a non-visual area surface and cannot be seen from the front. This greatly improves the yield and reliability and reduces the risk of edge debonding under force.
[0009] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0010] A touch screen assembly with a PMMA cover plate, characterized in that the touch screen assembly with a PMMA cover plate comprises a PMMA cover plate and a SENSOR glass substrate, the SENSOR glass substrate is bonded to the PMMA cover plate, a through hollow hole is provided on the PMMA cover plate, the SENSOR glass substrate comprises a glass substrate body, a visible area is provided in the middle of the glass substrate body, a plurality of avoidance areas are provided at the edge of the glass substrate body, the positions of the avoidance areas correspond one-to-one to the hollow holes, and the areas of the avoidance areas are larger than the hollow holes.
[0011] As a preferred implementation of the touch screen assembly with PMMA cover provided by the utility model, the edge of the avoidance zone is aligned with the edge of the PMMA cover.
[0012] As a preferred implementation of the touch screen assembly with PMMA cover provided by the utility model, the avoidance zone is a semi-open structure.
[0013] As a preferred implementation of the touch screen assembly with PMMA cover provided by the utility model, the avoidance zone is rectangular.
[0014] As a preferred implementation of the touch screen assembly with PMMA cover provided by the utility model, the avoidance zone is in an arc shape.
[0015] As a preferred implementation of the touch screen assembly with PMMA cover provided by the utility model, the avoidance zone is a closed annular structure.
[0016] As a preferred implementation of the touch screen assembly with PMMA cover provided by the utility model, the avoidance area is a rectangular hole.
[0017] As a preferred implementation of the touch screen assembly with PMMA cover provided by the utility model, the avoidance area is a circular hole.
[0018] As a preferred implementation of the touch screen assembly with PMMA cover provided by the utility model, an annular isolation foam is provided around the hollow hole.
[0019] As a preferred implementation of the touch screen assembly with PMMA cover provided by the utility model, the isolation foam is insulating foam.
[0020] Compared with the prior art, the utility model has the following beneficial effects:
[0021] The utility model provides a touch screen component with a PMMA cover plate. Since the area of the avoidance zone is larger than the hollow hole and the edge of the avoidance zone is aligned with the edge of the PMMA cover plate, a mechanical key position is avoided. After bonding, the area where the PMMA is not bonded can be greatly reduced. Even if the edge of the PMMA cover plate is debonded when a force is applied, it is a non-viewing area and cannot be seen from the front. Therefore, the yield and reliability are greatly improved, and the risk of debonding at the edge due to force is reduced.
[0022] In addition, the avoidance zone can be a closed annular structure. The avoidance zone is a rectangular hole. Alternatively, the avoidance zone is a circular hole. Since the avoidance zone is a closed annular structure, it has more fitting areas compared to the avoidance structure of a semi-open structure. Even if the edge of the PMMA cover plate is debonded when it is stressed, it is a non-viewing area surface, which further improves the yield and reliability.
[0023] In addition, a ring-shaped isolation foam can be provided around the hollow hole. The isolation foam is an insulating foam. The use of the insulating isolation foam can effectively improve the mechanical strength of the hollow hole and prevent cracks from occurring around the hollow hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0025] Figure 1 It is a structural schematic diagram of an existing touch screen assembly;
[0026] Figure 2 This is a schematic structural diagram of a touch screen assembly with a PMMA cover plate of the utility model;
[0027] Figure 3 for Figure 2 A schematic diagram of the structure of the touch screen assembly with a PMMA cover plate, at another viewing angle;
[0028] Figure 4 for Figure 2 A structural schematic diagram of another embodiment of a touch screen assembly with a PMMA cover plate;
[0029] Figure 5 for Figure 2 A structural schematic diagram of another embodiment of a touch screen assembly with a PMMA cover plate;
[0030] The markings in the figure are as follows: 1, SENSOR glass substrate; 10, visible area; 11, avoidance area; 1S, glass substrate body; 2, PMMA cover plate; 21, hollow hole; 22, isolation foam. DETAILED DESCRIPTION
[0031] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0032] As described in the background technology, in the prior art, for PMMA cover plates, since PMMA cover plates are not easy to break when subjected to external forces, and there are few fragments, which is much safer than glass materials. Therefore, for safety reasons, some cars use PMMA cover plates as the cover plate material for display screens. Since some display modules have mechanical buttons when designed, positions are hollowed out on the cover plate. In existing designs, generally, since the hollowed-out part does not have a touch function, the sensor glass is generally expanded more than the viewing area. However, since this design has some parts of the PMMA cover plate that are not fitted, when subjected to external forces, the PMMA cover plate is easily deformed, resulting in debonding at the edges, and since it is close to the viewing area, it is easy to see bubbles in the viewing area.
[0033] In order to solve this technical problem, the utility model provides a touch screen assembly with a PMMA cover plate, comprising a PMMA cover plate 2 and a SENSOR glass substrate 1, wherein the SENSOR glass substrate 1 is bonded and connected to the PMMA cover plate 2. The PMMA cover plate 2 is provided with a through hollow hole 21, and the SENSOR glass substrate 1 comprises a glass substrate body 1S, wherein a visible area 10 is provided in the middle of the glass substrate body 1S, and a plurality of avoidance areas 11 are provided at the edge of the glass substrate body 1S, wherein the positions of the avoidance areas 11 correspond to the hollow holes 21 one by one, and the areas of the avoidance areas 11 are larger than the hollow holes 21.
[0034] Through the above structural design, since the area of the avoidance zone 11 is larger than the hollow hole 21, and the edge of the avoidance zone 11 is aligned with the edge of the PMMA cover plate 2, the mechanical button part is avoided. After bonding, the area where PMMA is not bonded can be greatly reduced. Even if the edge of the PMMA cover plate 2 is debonded when force is applied, it is a non-visual area and cannot be seen from the front, which greatly improves the yield and reliability and reduces hidden dangers.
[0035] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.
[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0038] Example 1
[0039] like Figure 2 and Figure 3 As shown, the touch screen assembly with a PMMA (PMMA, ie, acrylic resin) cover plate comprises a PMMA cover plate 2 and a sensor glass substrate 1 , and the sensor glass substrate 1 is bonded to the PMMA cover plate 2 .
[0040] In addition, the PMMA cover plate 2 is provided with a through-hole 21.
[0041] In addition, the sensor glass substrate 1 includes a glass substrate body 1S, a visible area 10 is provided in the middle of the glass substrate body 1S, and a plurality of avoidance areas 11 are provided at the edge of the glass substrate body 1S. The positions of the avoidance areas 11 correspond to the hollow holes 21 one by one, and the areas of the avoidance areas 11 are larger than the hollow holes 21.
[0042] It should be noted that the edge of the avoidance zone 11 is aligned with the edge of the PMMA cover plate 2 .
[0043] In addition, the avoidance zone 11 is a semi-open structure. For example, the avoidance zone 11 is rectangular. Or, the avoidance zone 11 is arc-shaped.
[0044] The working mode of this embodiment is described below.
[0045] Since the area of the avoidance zone 11 is larger than the hollow hole 21, and the edge of the avoidance zone 11 is aligned with the edge of the PMMA cover plate 2, the mechanical button part is avoided. After bonding, the area where PMMA is not bonded can be greatly reduced. Even if the edge of the PMMA cover plate 2 is debonded when force is applied, it is a non-visual area and cannot be seen from the front. This greatly improves the yield and reliability and reduces the risk of debonding at the edge under force.
[0046] Example 2
[0047] like Figure 4 As shown, the touch screen assembly with a PMMA cover provided in Example 1 is further optimized. Specifically, the avoidance area 11 is a closed annular structure.
[0048] It should be noted that the avoidance zone 11 is a rectangular hole. Alternatively, the avoidance zone 11 is a circular hole.
[0049] The working mode of this embodiment is described below.
[0050] Since the avoidance zone 11 is a closed annular structure, it has more fitting areas compared to the avoidance structure of a semi-open structure. Even if the edge of the PMMA cover plate 2 is debonded when subjected to force, it is a non-visual area surface, which further improves the yield and reliability.
[0051] Example 3
[0052] like Figure 5 As shown, the touch screen assembly with the PMMA cover plate provided in Embodiment 1 or 2 is further optimized. Specifically, an annular isolation foam 22 is provided around the hollow hole 21 .
[0053] It should be noted that the isolation foam 22 is insulating foam.
[0054] The working mode of this embodiment is described below.
[0055] By using the insulating isolation foam 22 , the mechanical strength of the hollow hole 21 can be effectively improved, and cracks can be prevented from occurring around the hollow hole 21 .
[0056] The terms "coupling" and "coupling" involved in the embodiments of the present application should be understood in a broad sense. For example, they may refer to a direct physical connection, or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.
[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0058] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.
Claims
1. A touch screen assembly with a PMMA cover plate, characterized in that: The touch screen assembly with a PMMA cover plate comprises a PMMA cover plate (2) and a sensor glass substrate (1), wherein the sensor glass substrate (1) is bonded to the PMMA cover plate (2). The PMMA cover plate (2) is provided with a through-going hollow hole (21). The sensor glass substrate (1) comprises a glass substrate body (1S), a visible area (10) is provided in the middle of the glass substrate body (1S), a plurality of avoidance areas (11) are provided at the edge of the glass substrate body (1S), the positions of the avoidance areas (11) correspond one-to-one to the hollow holes (21), and the areas of the avoidance areas (11) are larger than the hollow holes (21).
2. The touch screen assembly with a PMMA cover plate according to claim 1, characterized in that: The edge of the avoidance zone (11) is aligned with the edge of the PMMA cover plate (2).
3. The touch screen assembly with a PMMA cover plate according to claim 1, characterized in that: The avoidance zone (11) is a semi-open structure.
4. The touch screen assembly with a PMMA cover plate according to claim 1, characterized in that: The avoidance zone (11) is rectangular.
5. The touch screen assembly with a PMMA cover plate according to claim 1, characterized in that: The avoidance zone (11) is in the shape of an arc.
6. The touch screen assembly with a PMMA cover plate according to claim 1, characterized in that: The avoidance zone (11) is a closed annular structure.
7. The touch screen assembly with a PMMA cover plate according to claim 6, characterized in that: The avoidance area (11) is a rectangular hole.
8. The touch screen assembly with a PMMA cover plate according to claim 6, characterized in that: The avoidance area (11) is a circular hole.
9. The touch screen assembly with a PMMA cover plate according to claim 1, characterized in that: An annular insulating foam (22) is provided around the hollow hole (21).
10. The touch screen assembly with a PMMA cover plate according to claim 9, characterized in that: The isolation foam (22) is insulating foam.