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Indiglo is a product feature on watches marketed by Timex, incorporating an electroluminescent panel as a backlight for even illumination of the watch dial. The brand is owned by Indiglo Corporation, which is in turn solely owned by Timex, and the name derives from the word indigo , as the original watches featuring the technology emitted a ...
Timex introduced the Indiglo night light during the Christmas shopping season in 1992. Indiglo made headlines as a result of the February 26, 1993 World Trade Center bombing, in which an office worker wearing a Timex with an Indiglo night light used its light to guide a group of evacuees down 40 dark flights of stairs. This caused sales to ...
A day and night camera is a security camera that can see the picture during the day hours, when there is enough sunlight, and during the night in total darkness or minimum illumination. A day and night camera has special lenses that allow infrared emission produced by infrared LEDs and reflected from objects to go through and reach a CCD or ...
November 1917 ad for an Ingersoll "Radiolite" watch, one of the first watches mass marketed in the USA featuring a radium-illuminated dial. Radium was discovered by Marie and Pierre Curie in 1898 [1] and was soon combined with paint to make luminescent paint, which was applied to clocks, airplane instruments, and the like, to be able to read them in the dark.
A talking clock (also called a speaking clock and an auditory clock) is a timekeeping device that presents the time as sounds. It may present the time solely as sounds, such as a phone-based time service (see " Speaking clock ") or a clock for the visually impaired, or may have a sound feature in addition to an analog or digital face.
Nixie tubes were superseded in the 1970s by light-emitting diodes (LEDs) and vacuum fluorescent displays (VFDs), often in the form of seven-segment displays. The VFD uses a hot filament to emit electrons, a control grid and phosphor-coated anodes (similar to a cathode-ray tube ) shaped to represent segments of a digit, pixels of a graphical ...