A utg-qd type mini-led board and its application, preparation method and optical structure

Abstract

The invention discloses a UTG-QD type MINI-LED board and its application, preparation method and optical structure, which solves the technical problem of low optical utilization rate in the prior art. The UTG‑QD MINI‑LED board includes a UTG substrate, a QD quantum dot layer and a copper layer, and is used in the preparation of a light diffusion board. The preparation method is to coat the copper layer and the titanium dioxide particle layer on the light-incoming surface of the UTG substrate, build micron-scale grooves on the light-emitting surface, and then coat the QD quantum dot layer and the diffusion layer, and glue the transparent barrier film layer on the diffusion layer or paste UTG layer, copper layer and titanium dioxide particle layer with openings. The optical structure is pasted on the UTG-QD MINI-LED board with a light-enhancing film layer and a diffusion film layer, and the optical structure is locked with a locking piece. The invention can effectively improve the utilization rate of light, and can also improve the adhesion and luminous efficiency of QD quantum dots.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a UTG-QD type MINI-LED board and its application, preparation method and optical structure. Background technique [0002] Traditional direct-lit backlight structure as attached Figure 13 As shown, it mainly includes a PCB board, a blue LED arranged on the PCB board, and a polystyrene (PS) diffuser board. The polystyrene (PS) diffusion plate is covered with a diffusion film, a brightness enhancement film and a QD film from top to bottom. The main function of the PS diffuser is to fully scatter the incident light to achieve a softer and more uniform irradiation effect. The thickness of the diffuser plate made of polystyrene and the rigidity of the plate cannot be balanced. The plate is too thin, the flatness of the support plane is not enough, and the middle is easy to collapse, resulting in uneven light mixing and dark shadows from the direct-type LED lamp beads. ...

AI Technical Summary

Problems solved by technology

The thickness of the diffuser plate made of polystyrene and the rigidity of the plate cannot be balanced. The plate is too thin, the flatness of the support plane is not enough, and the middle is easy to collapse, resulting in uneven light mixing and dark shadows on the direct-type LED lamp beads. Visual effect; to achieve the required flatness, it is necessary to add a part of the diffusion particles to the polystyrene, which will result in a thickness greater than 0.8mm

In addition, if it is used for large-sized models, support columns must be added under the diffuser plate (as shown in the attached Figure 13 shown) to reduce the deformation of the plate, which not only increases the cost, but also affects the picture effect

In addition, polystyrene has very low temperature resistance. Generally, thermal deformation begins to appear at around 70°C, and it is easy to turn yellow. If the direct-type backlight module lamp beads and the diffuser plate adopt 0 spacing or small spacing, it will directly affect the life and effect of the backlight.

Due to the problem of heat dissipation of the lamp bead, the distance between the diffuser plate and the surface of the lamp bead is generally greater than 3mm. The resulting problem is that the light mixing distance is too large, which affects the thickness and appearance of the whole machine, and the optical utilization rate of the LED lamp bead is too low. Module brightness is low

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