Large-light-out-angle Mini LED backlight module and manufacturing method thereof

Abstract

The invention belongs to the technical field of LED liquid crystal display, and provides a large-light-out-angle Mini LED backlight module. The large-light-out-angle Mini LED backlight module is characterized in that a substrate is internally provided with an inverted trapezoidal pit, a metal conducting layer and a white ink layer covering the metal conducting layer are deposited on the substrate,the inverted trapezoidal pit is internally provided with a Mini LED chip, an electrode under the Mini LED chip is electrically connected with the metal conducting layer used for leading the electrodeof the Mini LED chip out, and the side face of the Mini LED chip is in contact with the white ink layer. The large-light-out-angle Mini LED backlight module has the advantages that the light out angle of the Mini LED chip of the backlight module is greatly increased, so that the Mini LED chip required by a liquid crystal panel is greatly reduced, the material cost of a backlight panel is effectively reduced, the failure rate of the chip is also reduced, and the yield of the backlight panel is improved.

Description

technical field [0001] The invention relates to a Mini LED backlight module and a manufacturing method thereof, in particular to a Mini LED backlight module with a large light emitting angle and a manufacturing method thereof, belonging to the technical field of LED liquid crystal displays. Background technique [0002] As the public pursues ultra-high-definition displays, display technology requires higher contrast ratios. Micro LED, known as the next-generation display technology, has become an area where manufacturers are actively deploying. However, due to various technical bottlenecks, Micro LED is far from reaching formal mass production, so Mini LED came into being. LCD (liquid crystal) displays using Mini LED backlight technology are far superior to today's LCD displays in terms of brightness, contrast, color reproduction, and energy saving, and can even compete with AMO LEDs while controlling production costs. Thanks to the vastly increased number of LEDs used for ...

AI Technical Summary

Problems solved by technology

001 is the circuit substrate, 008 is the Mini LED chip based on the LED flip-chip structure, 005 is the LCD panel, and 004 is the light mixing area; usually the light output angle of the Mini LED chip is between 120°~130°, due to the thin and light design, The height distance of the light mixing area tends to be smaller and smaller, making the distance between the LCD panel and the Mini LED chip closer and closer. Since the light output angle of the Mini LED chip is small, we need more chips to meet the requirements of the entire panel. Backlight requirements; increase the cost of backlight modules for making panels, because more chips mean higher chip failure rates and reduce the yield of the entire panel

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