Membrane with uniform chroma

Abstract

Provided is a membrane with uniform chroma, comprising: a substrate, a surface treatment layer, a first refraction layer and a second refraction layer that are coated on the substrate, with the first refraction layer being close to the substrate and the second refraction layer being far from the substrate, and a transparent conducting layer. The optical thickness of the first refraction layer is d1 wherein d1 satisfies the relation 11nm<=d1<=16nm. The refractive index of the second refraction layer is lower than that of the first refraction layer and the optical thickness of the second layer is d2 wherein d2 satisfies the relation 60nm<=d2<=90nm. In addition, the arrangement of the surface treatment layer can be omitted in the present invention when the optical thickness of the first refraction layer satisfies the relation 20nm<=d1<=29nm. Through the coordination of the optical thicknesses of the first refraction layer and the second refraction layer, chroma differences can be reduced between the etched blocks and non-etched blocks of the transparent conducting layer to give the membrane a uniform color so that the etched patterns are not easily observed and the phenomenon that the membrane tends to be yellow is alleviated.

Description

technical field [0001] The invention relates to a film, in particular to a transparent conductive film which can be applied to a touch panel and has uniform chromaticity. Background technique [0002] The indium tin oxide (ITO) transparent conductive film currently used in touch panels, due to the low temperature of the coating process and the low transmittance of the material itself in the low wavelength band, makes the film yellowish, resulting in poor visual perception of the panel. good. In addition, after the ITO film coating is formed, in order to configure circuits or capacitors, some blocks must be etched and removed through an etching process. Therefore, the part on the panel corresponding to the etched part of the ITO film and the part corresponding to the unetched part , will cause obvious color differences due to the presence or absence of ITO materials, making the panel surface color uneven, and causing surface etching patterns to be easily observed, thereby af...

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Problems solved by technology

[0005] However, the above-mentioned patents only try to reduce the overall chromaticity b* value of the film, but do not take into account the color inhomogeneity of the etched area and the non-etched area caused by the etching of the ITO film, so when the ITO film is etched, there will still be Produces multiple areas of uneven color and allows the etch pattern to be clearly observed

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