Abstract
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.
Highlights
Because visible light does not pass through an opaque substrate, but is absorbed or scattered, the human eye cannot recognize any object behind an opaque substrate
The radiation energy associated with the IR intensity emitted from an electric conductor, such as an indium tin oxide (ITO) thin film, is influenced by the surface temperature of the object, according to the Stefan– Boltzmann equation,9,10
A SiO2/Si substrate that is opaque in the visible light spectrum, but transmits IR rays, is suitable for implementing a double-sided IR display
Summary
Because visible light does not pass through an opaque substrate, but is absorbed or scattered, the human eye cannot recognize any object behind an opaque substrate. A SiO2/Si substrate that is opaque in the visible light spectrum, but transmits IR rays, is suitable for implementing a double-sided IR display.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
