Backlight module and manufacturing method thereof

Abstract

The present invention provides a backlight module and a manufacturing method thereof. The backlight module comprises a heat conductive plate, a first optical film, a plurality of quantum dot films, and a plurality of light sources. The heat transfer plate has a first coefficient of heat conduction, the first optical film is bonded to the heat transfer plate and has a second coefficient of heat conduction smaller than the first coefficient of heat conduction. The first optical film includes a reflecting surface and a plurality of first light-emitting holes distributed thereon. The reflecting surface is formed on a side of the first optical film opposite to the heat transfer plate, and the plurality of quantum dot films are adhered to the reflecting surface at intervals, and the plurality of light sources are disposed corresponding to the quantum dot films. The light generated by the light sources is excited by the quantum dot films to generate excitation light which is directly or reflected by the reflecting surface and then passes through the first light-emitting hole and the heat transfer plate.

Description

technical field [0001] The invention relates to a backlight module; specifically, the invention relates to a backlight module using quantum dots. Background technique [0002] Quantum dots have different wavelengths of light after excitation according to their particle size, thus emitting colored light. Due to its high color gamut, accurate color development and high color saturation, it has considerable potential in the display market. Quantum dots can emit light by themselves, but they are also often used as filter materials in displays, such as as a filter layer and / or as a quantum dot film (Quantum dot film, QD film), and match with a light source such as a light-emitting diode to emit light, or use in color alignment. [0003] Since the cost of quantum dots is not low, we strive to be precise in design and use. For example, quantum dots or quantum dot films are arranged at the projected position along the light source vertical to the display surface; in other words, ...

AI Technical Summary

Problems solved by technology

[0004] However, when the quantum dots are excited by light waves from the light source 920, heat is also generated; the generated heat affects the display panel 90

Due to the array distribution of quantum dots on the filter layer 900, the heat generated causes the temperature difference of the panel, thereby causing uneven internal stress of the display panel 90, resulting in uneven light leakage of the display device 9

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