Structure of curved capacitive touch control panel

Abstract

The invention provides a structure of a curved capacitive touch control panel, which comprises a three-dimensional curved flexible circuit board with a capacitive touch control function, a touchable three-dimensional curved glass substrate and an adhesive layer. The three-dimensional curved flexible circuit board is provided with a first curved lateral face and a first curved end face, which are formed by at least two axial arc curved moulds by means of compression molding. The three-dimensional curved glass substrate is provided with a second curved lateral face and a second curved end face, which are mutually coupled and attached into a whole corresponding to arc curved shapes of the three-dimensional curved flexible circuit board. The adhesive layer is arranged between the three-dimensional curved glass substrate and the three-dimensional curved flexible circuit board and used for bonding the three-dimensional curved flexible circuit board onto the three-dimensional curved glass substrate.

Description

[0001] This application is a divisional application with the application number 200810172344.5, the application date being October 31, 2008, and the invention titled "Method and Structure of Curved Capacitive Touch Panel". Technical field [0002] The invention relates to a curved capacitive touch panel structure, in particular to a curved capacitive touch panel structure formed by plasticizing the capacitive touch panel. Background technique [0003] There are more common flat touch panels (Touch Panels), including resistive and capacitive touch panels. Among them, the capacitive touch panel has a touch circuit, which can be exposed, developed, and etched by yellow light processes. , Stacking transparent conductive materials (Indium Tin Oxide, ITO) one by one on the surface of a transparent substrate to become a transparent capacitive touch panel; or, the touch circuit can also be a flexible circuit Board (FLEXBILPRINTED CIRCIT, FPC), the flexible circuit board is directly attach...

AI Technical Summary

Problems solved by technology

[0004] It is known that the current optoelectronic products will be advanced with curved surface design as the mainstream; therefore, when designing the product, adding some physical buttons and art seams on the surface will cause the curvature of the product surface to be uncoordinated, and increase the surface area. The difficulty of designing and manufacturing the curved surface; in addition, related technologies related to the above-mentioned curved surface products can be found in British Patent No. 1110377, Japanese Patent No. 2002341323, Chinese Patent No. 1612185 (publication number), and AU Optronics Co., Ltd. The company (AUO PTRONIC SCORP.) publicly announced and demonstrated the convex curved liquid crystal display in June 2008; however, the described technology is about the curved surface application of safety glass or LCD, and neither mentions the curved surface application of the touch panel

[0005] In view of this, in the more advanced technology, related technologies related to the design of the curved surface of the above-mentioned touch panel have been disclosed. It can be seen in US Patent No. 6,654,071, which provides a display that can be freely bent according to the curvature of the display surface. A curved flexible capacitive touch panel is used to attach to the surface of the display, so that the display has a touch function; in addition, Chinese Patent No. 1479891 (publication number) also provides a The curved capacitive touch pad is provided with a functional film between two curved rigid transparent protective plates, and has touch capability; however, the touch pad of U.S. Patent No. 6,654,071 and the touch pad of Chinese Patent No. 1,479,891 All can only be bent into a curved surface along one axis (such as the longitudinal axis or horizontal axis of the touch panel), but cannot form a curved surface with multiple axes, and the touch panel and the touch panel described above are not disclosed. pad; therefore, there are still many technical problems to be overcome in order to make the above-mentioned touch panel into a curved shape

[0006] In order to overcome the above problems, U.S. Patent No. 20080042997 discloses a curved resistive touch panel. The main method is to firstly attach the plane polarizer to the touch panel, and then simultaneously press the polarizer and the touch panel to form a curved surface. ; Its disadvantage is that if the polarizing plate and the touch panel fail to be pressurized, both of them will become waste materials, and the polarizing plate and the touch panel are in a state where a plurality of base materials are bonded to each other. In the process of forming a curved surface, it is easy to cause partial fracture of the base material with weak stress intensity, and at the same time, it is easy to generate interference stripes, which become waste materials that fail to pressurize, so it is urgent to improve

[0007] In addition, most of the existing flat touch panels use glass materials as substrates. Compared with plastic materials (such as PET), they have better light penetration, scratch resistance, wear resistance, and less deformation. If glass substrates are to be made into Curved surface, the glass substrate needs to be subjected to high temperature hot pressing to bend to form a curved glass substrate; however, the production of a curved glass substrate requires a very high working temperature (about 650 to 750 degrees Celsius), and the flexible circuit board is in the It will crack at an operating temperature of about 300 degrees Celsius, so the flexible circuit board obviously cannot be made into a curved touch panel together with the flat glass substrate

Images