Protection panel provided with touch input function for electronic device display window

Abstract

Provided is a protection panel (1) provided with a touch input function for an electronic device display window having an FPC (10) for extracting electric signals through through holes (9a, 9b, 9c, 9d) arranged on a lower electrode panel (3). An adhesive layer (16) which bonds the lower electrode panel and an upper electrode sheet (2a) has a connecting hole (16a) communicating with the through holes, a plurality of dot spacers (30) are fixedly arranged at intervals between a peripheral section of the through hole on an upper surface of the lower electrode panel and an upper electrode sheet (2) in the connecting hole. The connecting hole wherein gap intervals are maintained by the dot spacers is filled with a conductive adhesive (15) from the through holes.

Description

technical field [0001] The present invention relates to a protection panel with a touch input function for a display window of an electronic device having an excellent reliability of an FPC connection part, which is used for portable information terminals such as PDAs (Personal Digital Assistants), portable terminals, copiers, OA (Office Automation: Office Automation) equipment such as facsimile machines, smartphones, mobile phones, portable game consoles, electronic dictionaries, car navigation systems, small PCs (Personal Computer: Personal Computers), and various home appliances, etc. Background technique [0002] Cases in electronic devices such as mobile phones and smartphones are generally constructed by combining a front case and a rear case made of synthetic resin. Specifically, a protective panel is fixed to the surface of the front case by welding or the like in order to protect the liquid crystal display window. In addition, colorless and transparent resin panels...

AI Technical Summary

Problems solved by technology

That is, in each connection hole 121 as the penetration portion of the adhesive layer 116, there is a gap between the movable piece 102 and the lower electrode panel 103 as a matter of course (refer to Figure 15 ), and the movable piece 102 is easy to bend downward integrally, therefore, the distance between the movable piece 102 and the lower electrode panel 103 is easily changed

Therefore, when injecting the conductive adhesive 115, as Figure 16 As shown, there is a defect that the movable piece 102 on each connection hole 121 is recessed and the conductive adhesive 115 cannot be fully injected.

Reliability of connection with the conductive adhesive 115 in the connection part 108, especially as the electrode terminals 107c, 107d, the electrode terminals 107c, 107d and the ribbon bus bars 107a, 107b are formed by other The connection reliability when separately formed depends on the filling state of the conductive adhesive 115. If the conductive adhesive 115 cannot be sufficiently injected as described above, the connection reliability of the FPC 110 with leads will be reduced.

[0013] Moreover, since the conductive adhesive 115 is cured by heating and drying or curing at room temperature (moisture curing, anaerobic curing, two-component curing), the movable piece 102 on each connection hole 121 as described above In the state where the conductive adhesive 115 cannot be fully injected due to the depression, if the conductive adhesive 115 is cured, the depression of the movable piece 102 will be maintained.

As the protective panel 101 with touch input function, the entire surface of the movable sheet 102 constitutes the exterior decoration of the electronic device, and because the movable sheet 102 has depressions, the appearance quality is poor.

[0014] Moreover, even if no dent occurs when the conductive adhesive 115 is injected, a dent will occur in the movable piece 102 due to the shrinkage of the conductive adhesive 115 when it is heated and dried or cured at room temperature. , resulting in a reduction in the appearance quality of the protective panel 101

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