KR-20260067054-A - Touch Screen Apparatus Using Touch Film and Flexible Circuit board

KR20260067054AKR 20260067054 AKR20260067054 AKR 20260067054AKR-20260067054-A

Abstract

A touchscreen device using a touch film and an FPC is disclosed. According to one embodiment of the present disclosure, a touch screen device using a touch film and an FPC is provided, comprising: a touch film attached to the front of a display positioned at any location within a vehicle for detecting user input; a panel positioned on the front of the touch film and providing visual elements so that a user can verify information output to the display; a touch film attachment portion that determines the attachment position of the touch film on the rear surface of the panel between the panel and the touch film and fixes the panel and the touch film to each other; and a flexible circuit board having one end electrically connected to the touch film attachment portion and the other end electrically connected to a PCB connector, wherein the device comprises an adhesive member applied to a part or all of the attachment area where the touch film attachment portion and the flexible circuit board are physically connected.

Inventors

황보태영
정찬웅
김수지
이정태
이창권

Assignees

현대모비스 주식회사

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (9)

A touch film that detects user input and is attached to the front of a display positioned at a location within the vehicle; A panel disposed on the front of the above-mentioned touch film and providing visual elements so that a user can check information output on the above-mentioned display; A touch film attachment part that determines the attachment position of the touch film on the rear surface of the panel between the panel and the touch film, and fixes the panel and the touch film to each other; and It includes a flexible circuit board in which one end is electrically connected to a touch film attachment part and the other end is electrically connected to a PCB connector, A touch screen device using a touch film and an FPC, comprising an adhesive member applied to part or all of the attachment area where the touch film attachment portion and the flexible circuit board are physically connected.
In Article 1, The above adhesive member is, A touchscreen device using a touch film and an FPC comprising either a silicone or a conformal coating solution.
In Article 1, The above adhesive member is, A touchscreen device using a touch film and an FPC, applied using either a surface application method that continuously applies the entire area of the attachment area or a point application method that applies a part of the attachment area.
In Paragraph 3, The above surface coating method is, A touchscreen device using a touch film and an FPC, wherein the adhesive member is additionally applied to additional areas in the horizontal and vertical directions based on the above attachment area.
In Paragraph 3, The above dot application method is, A touchscreen device using a touch film and an FPC, wherein the adhesive member is applied to each of the two ends in the longitudinal direction of the attachment area in a predetermined amount.
In Article 1, A touchscreen device using a touch film and an FPC, further comprising a button housing disposed between the touch film and the panel and configured to partition a touch area of the touch film.
In Article 6, The above button housing is, A touchscreen device using a touch film and an FPC, configured to form a predetermined gap with the attachment area or not form a gap based on the type of the adhesive member.
In Paragraph 4, The above touch film is, A touch screen device using a touch film and an FPC, further comprising an additional touch film area formed to be in contact with all additional areas of the adhesive member.
In Article 8, The additional area of the touch film mentioned above is, A touchscreen device using a touch film and an FPC that increases the contact area with the touch film attachment portion disposed on the front surface of the touch film.

Description

Touch Screen Apparatus Using Touch Film and Flexible Circuit Board The present disclosure relates to a touch screen device using a touch film and an FPC. The content described in this section merely provides background information regarding the present disclosure and does not constitute prior art. Vehicle infotainment systems are evolving to enhance driver convenience and safety, and these systems are configured using the vehicle's touchscreen. The touchscreen integrates functions such as in-vehicle entertainment control, navigation, vehicle settings, and climate control systems, providing an interface that allows the driver to operate intuitively. In particular, users can operate the interface by pressing or swiping on the touch film of the touchscreen with their hands. FIG. 1 is a simplified cross-sectional view of a touch screen according to the prior art. Referring to FIG. 1, the touch screen includes a panel (10), a touch film attachment part (11), a touch film (12), and a flexible printed circuit board (13). Here, the panel (10) detects a user's touch input. One end of the flexible printed circuit board (13) is connected to the touch film attachment part (11), and the other end is connected to a PCB (Printed Circuit Board) connector (not shown). The panel (10) and the flexible circuit board (13) must be properly connected for the touchscreen to properly recognize the user's touch. However, due to condensation or other factors at the connection point between the flexible circuit board (13) and the PCB connector, an electromigration phenomenon may occur, resulting in touch failure. Here, electromigration refers to the phenomenon of material movement caused by the continuous movement of ions within a conductor resulting from the transfer of momentum between conduction electrons and scattered atomic nuclei within the metal. Consequently, there is a problem of contact failure and recognition failure of the touchscreen. FIG. 1 is a simplified cross-sectional view of a touch screen according to the prior art. FIG. 2 is a drawing showing a surface coating method of an adhesive member according to one embodiment of the present disclosure. FIG. 3 is a drawing showing an additional area of a touch film according to another embodiment of the present disclosure. FIG. 4 is a drawing for showing the gap between a button housing and a flexible circuit board according to one embodiment of the present disclosure. FIG. 5 is a drawing showing a spot application method of an adhesive member according to one embodiment of the present disclosure. Some embodiments of the present disclosure are described in detail below with reference to the exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the present disclosure, if it is determined that a detailed description of related known components or functions could obscure the essence of the present disclosure, such detailed description is omitted. In describing the components of the embodiments according to the present disclosure, symbols such as first, second, i), ii), a), b), etc., may be used. These symbols are intended only to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the symbols. When a part in the specification is described as 'comprising' or 'having' a component, this means that, unless explicitly stated otherwise, it does not exclude other components but may include additional components. Where it is stated that one component is 'connected', 'combined', or 'joined' to another component, it should be understood that while the component may be directly connected or joined to the other component, another component may also be 'connected', 'combined', or 'joined' between each component. Terms such as 'part', 'module', etc., as described in the specification refer to a unit that processes at least one function or operation, and this may be implemented in hardware, software, or a combination of hardware and software. Unless otherwise stated, it should be noted that the description of any one embodiment may also apply to other embodiments. The description of the invention disclosed below, together with the accompanying drawings, is intended to describe exemplary embodiments of the invention and is not intended to represent the only embodiment in which the invention may be practiced. FIG. 2 is a drawing showing a surface coating method of an adhesive member according to one embodiment of the present disclosure. The configuration of the touchscreen illustrated in FIG. 2 illustrates only the touch film (20) and the flexible circuit board (23) among the configurations of FIG. 1 described above, and illustrates the adhesive member according to the present disclosure. In other words, although the panel