Transparent coordinate input device and composite material for forming ridge part on transparent resistor membrane

Abstract

The invention provides a transparent coordinate input device and a composite material in which a ridge is formed on a transparent resistance film. A transparent coordinate input device and a transparent composite material capable of suppressing the occurrence of interference fringes and blurring during input operations and suppressing deterioration of visibility due to reflection of display light. A plurality of ridges (45) extending in one direction are formed on the surface of the first transparent resistive film (31). Such ridges (45) are, for example, triangular-shaped protrusions in cross section, and are configured to alternately form a set of slopes (46a) and slopes (46b) on the surface of the first transparent resistive film (31). Such narrow and long multiple slopes (46a), (46b) on the surface of the first transparent resistance film (31), that is to say, on the slopes (46a), (46b), it will be difficult to identify with human eyes. extremely fine interference fringes. Since the step P of the ridge (45) is made sufficiently thin, the interference fringes generated in the transparent coordinate input device become so thin that they cannot be recognized, and the interference is hardly visible from the appearance. the presence of stripes.

Description

technical field [0001] The present invention relates to a transparent coordinate input device for directly inputting coordinates on a screen and a transparent composite material constituting the transparent coordinate input device. Background technique [0002] Portable information terminals represented by PDAs generally have a coordinate input device for operating a display screen such as a liquid crystal display panel with a pen or fingers to select a menu or input data. Such a coordinate input device generally includes a transparent coordinate input device formed on the upper side of the liquid crystal display panel for instructing the display on the liquid crystal display panel for input. A resistive film-type transparent coordinate input device, which is widely used even in transparent coordinate input devices, is equipped with a layer called ITO (Indium Tin Oxide: Indium Oxide) formed on the surface of the liquid crystal display panel, as is well known. Tin) transpare...

AI Technical Summary

Problems solved by technology

When such interference fringes are generated, the visibility of the liquid crystal display panel will be reduced every time the transparent coordinate input device is operated, making it difficult to perform smooth and comfortable input operations.

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