| Summary |
Digital signage, which is advertising media by liquid crystal display (LCD), is expanded into many scenes, and has much possibility. One possible application is wireless communications between the digital signage and viewers. In this study, we focus on the visible light image sensor communication (VLISC). Since VLISC needs only an image sensor (IS), which is prevalent equipment of smart phone, and LCD, it can solve a cost problem of introduction of the wireless communication system. In VLISC, the digital signage displays information signal on LCD. Therefore there is an issue that embedding the information signal into advertisement may decrease the quality of advertisement. In this study, we propose blue color difference modulation, which can make imperceptible signal. By the construction of VLISC system between digital signage and IS, we show the effect of the proposed modulation in real environment. |
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