{'fraction_non_alphanumeric': 0.018936635105608158, 'fraction_numerical': 0.0, 'mean_word_length': 5.331797235023042, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Double-sided infrared display using an opaque substrate based on infrared image recognition mechanism

The human eye cannot recognize the shape of an object behind an opaque substrate; however, by reading and imaging infrared (IR) rays emitted from such an object, its shape behind the opaque substrate can be ascertained. In this study, an infrared double-sided light-emitting display was deposited on an opaque substrate and the transmission characteristics of infrared rays were measured under various conditions, such as changes in the thickness of the opaque substrate, the distance between the opaque substrate and the object, the infrared intensity of the object, and the viewing angle of the object. By selecting an opaque substrate material suitable for an IR display, the IR transmittance and heat diffusivity were improved. Additionally, by controlling the IR intensity of the IR emitter patterned on the opaque substrate, display information of various colors could be expressed from the IR vision, similar to the RGB wavelength separation of visible light. This technology deviates from the stereotype that a double-sided light-emitting display should use a transparent substrate and demonstrates that a double-sided light-emitting display can be made of an opaque substrate material if the light emission characteristics of IR rays are efficiently controlled.