Coding Single LED Signal for Information Perception

• Main Authors: Chih-Wei Lai, 賴誌偉
• Other Authors: 黃子坤
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/vps38k

碩士 === 國立臺北科技大學 === 創新設計研究所 === 100 === Light signals have been playing an important role in human-machine interactions. They deliver information such as statuses, hints, operation feedbacks and warnings. There is no standard for light signal coding among various information property of product interface, that lead to users’ confusions in perception and burdens on memories. Incorrect interpretations of light signals may lead to damage to machines or casualties. Therefore, this study explored users’ perception of single LED signals and examined the pertinency of information delivery, in hopes of improving the light signal coding in human-machine interactions. This study contains three phases. The first phase started with collection of current technologies of light signals and summarizing literature related to perception, memories, followed by discussing elements of composing light signals, including color, frequencies, and flickering pattern,. The second phase focused on recoding single light signals and constructing two sets of light signals, that were designed with instant messaging specifically for electric charging context and heating context, and the coding steps are (a) determining product property, (b) selecting status information, (c) setting colored light, (d) matching corresponding frequency and flickering method . The third phase is the validation of users’ recognization (perceptibility) of light signal sets. (The experiments were designed based on the code selection criteria. And four tasks were summarized, including whether to red instructions, whether corresponding light signals are correct, etc., to verify the recognition degrees and matching degrees of the two sets of light signals. The research findings: (1) Every light signal in both charging context and heating context presented high matching effect. (2) Those did not read users’ instructions were not inferior to those who did in completing the recognizing tasks, which indicated the intuitive perceptibility of the proposed light signal sets. (3) Users took longer time to complete the light signal sets recognizing tasks in heating context than in charging context. The light signal design for heating product or products require security concern needs to employ multimodal interface (combining voice or symbols) for message assuredness.