Minitype LED array device for displaying and lighting and preparation method

The invention discloses a minitype LED array device for displaying and lighting and a preparation method, relates to the technical field of LEDs, and solves the problems that in an LED micro display manufactured conventionally, the size of a lighting unit is hard to be small, the resolution ratio is caused to be limited, and the requirements cannot be adapted. The operation processes of the device are that current is injected from upper electrodes and outflows from lower electrodes, an electric field is formed in the device, the positive and negative current carriers carry out recombination luminescence on luminous layers, part light passes through photic layers upwards, and is outshot from micro lens, and part light reach reflective layers downwards, is reflected by the reflective layers, penetrates through the luminous layers and the photic layers, and is outshot from the micro lens. As the luminous principle of the luminous device is the current carrier compound luminescence in p-n junction, the nonlinear