With the prevalence of instant messaging and social media platforms, emojis have become important artifacts for expressing emotions and feelings in our daily lives. We ask how HCI researchers have examined the role and evolution of emojis in sharing emotions over the past 10 years. We conducted a systematic literature review of papers addressing emojis employed for emotion communication between users. After screening more than 1,000 articles, we identified 42 articles of studies analyzing ways and systems that enable users to share emotions with emojis. Two main themes described how these papers have (1) improved how users select the right emoji from an increasing emoji lexicon, and (2) employed emojis in new ways and digital materials to enhance communication. We also discovered an increasingly broad scope of functionality across appearance, medium, and affordance. We discuss and offer insights into potential opportunities and challenges emojis will bring for HCI research.

翻译：随着即时通讯和社交媒体平台的普及，表情符号已成为日常生活中表达情感与感受的重要载体。本文探讨了过去十年中人机交互研究者如何审视表情符号在情感分享中的作用与演变。我们对涉及用户间情感交流所用表情符号的文献进行了系统性综述。在筛选了1000余篇论文后，最终确定了42篇聚焦于用户通过表情符号分享情感的方式与系统的研究文献。这些研究主要围绕两大主题展开：(1) 如何帮助用户在日益增长的表情符号库中更准确地选择合适表情；(2) 如何通过创新方式将表情符号应用于新型数字媒介以增强交流效果。我们还发现表情符号在外观呈现、媒介载体和功能可供性三个维度上呈现出日益广泛的功能拓展。最后，本文探讨了表情符号为人机交互研究带来的潜在机遇与挑战，并提出了相应见解。