Electronic display device offering a day display function, and a display function compatible with night-vision instruments

An electronic display device comprising

• a display surface, and on the display surface, an arrangement of a plurality of compact assemblies for composing an image,
• the electronic display device further comprising
• a circuit for controlling the plurality of compact assemblies and that is configured to control each of the compact assemblies of the plurality individually,
• each compact assembly being made up of identical inorganic semiconductor microscopic LEDs or micro-LEDs of one single native colour diodes some of which are covered with quantum dots or with phosphor in order to provide colours shifted to the red from the native colour, compact assemblies of the plurality being controlled by said circuit as variable colour pixels of the electronic display device,
• one group of light-emitting diodes of a compact assembly of the plurality comprising a so-called red diode which is the closest in the group, by its emission spectrum, to the red end of the visible light spectrum and one or more other light-emitting diodes which together have a common emission spectrum comprising, during nominal operation, proportionally less red than that of the red light-emitting diode, said group being controlled to turn on with other compact assemblies of the plurality a colour display pixel for an operator to the naked eye,
• wherein the compact assembly further comprises an additional light-emitting diode in addition to those of said group, which additional light-emitting diode has, during nominal operation, with respect to said red diode, a wavelength that is shifted less close to red, and with respect to said common emission spectrum a supplementary emission spectrum, said additional light-emitting diode being controlled by the circuit to be turned on as a replacement for said red diode which is then turned off when said group is controlled by the circuit to turn on with the other compact assemblies of the plurality a colour pixel compatible with the use by an operator and in the vicinity of the display device of a night-vision tool sensitive to the near-infrared,
• said additional light-emitting diode being one of said inorganic semiconductor microscopic LEDs or micro-LEDs of one native colour diodes and being covered with a quantum dot or with a phosphor emitting an orange light,
• wherein an arrangement of the inorganic semiconductor microscopic LEDs or micro-LEDs of the compact assemblies constitutes a tessellation of the display surface.