Uled light-emitting and display device without electrical contact, external carrier injection and mass transfer and preparation method thereof

Abstract

The present invention relates to a μLED light-emitting and display device without electrical contact, external carrier injection and mass transfer and a preparation method thereof. The μLED light-emitting and display device includes one or more light-emitting pixels, and each light-emitting pixel includes a pixel lower electrode, a lower insulation layer, a μLED chip, an upper insulation layer and a pixel upper electrode from bottom to top, wherein the upper insulation layer and the lower insulation layer prevent the μLED chip from being in direct electrical contact with the pixel lower electrode and the pixel upper electrode, and the μLED chip is lit by an alternating electric field through electromagnetic coupling. In the present invention, the μLED chip is not in electrical contact with a driving electrode, such that a structure of the μLED chip may be simplified, a μLED chip array may be disposed in a manner such as ink-jet printing, screen printing, spin coating, brush coating, roll coating or chemical self-assembly, the use of a mass transfer process and a complex bonding process of the μLED chip and a driving array may be avoided, a manufacturing period of the μLED device is effectively shortened and manufacturing costs are reduced, and it is expected to enhance the market competitiveness of the μLED.