Wide color gamut backlight source for display of LED combined with perovskite quantum dot glass-ceramics

Abstract

The invention provides a wide color gamut backlight source for display of LED combined with perovskite quantum dot glass-ceramics, and is used for providing a light source for the displayer. The backlight source comprises the LED and the perovskite quantum dot glass-ceramics. The perovskite quantum dot glass-ceramics comprises red light, green light and blue light perovskite quantum dot glass-ceramics. The perovskite quantum dot glass-ceramics material is CsPbX3 (X=Cl, Br, I) or CsPb (ClxBr1-x) 3 or CsPb (BrxI1-x) 3. The backlight source spectrum contains its own blue light component of the blue LED, the narrow linewidth green light component produced by exciting CsPbBr3 or CsPb (BrxI1-x) 3 quantum dot glass-ceramics by the blue LED and the narrow linewidth red light component produced byexciting CsPbI3 or CsPb (BrxI1-x) 3 quantum dot glass-ceramics by the blue LED. The backlight source spectrum can also contain the narrow linewidth blue light component produced by exciting the blue light CsPb (ClxBr1-x)3 quantum dot glass-ceramics by the short wavelength LED of which the wavelength is less than the absorption cutoff wavelength of the quantum dot, the narrow linewidth green lightcomponent produced by exciting the CsPbBr3 or CsPb (ClxBr1-x)3 quantum dot glass-ceramics by the short wavelength or blue LED and the narrow linewidth red light component produced by exciting the CsPbI3 or CsPb (ClxBr1-x)3 quantum dot glass-ceramics by the short wavelength or blue LED.

Description

technical field [0001] The invention relates to the technical field of backlight sources, in particular to a wide color gamut backlight source for display in which LEDs are combined with perovskite quantum dot glass-ceramics. Background technique [0002] At present, the main technologies and their advantages and disadvantages of wide color gamut backlight for display are as follows: [0003] 1. Blue LED chips combined with Ce 3+ : YAG yellow phosphor technology. This is an existing mass-produced technology with a high degree of technical maturity, but its disadvantages are insufficient red and green light components, and a low color gamut, which only meets 72% of the color gamut standard of the National Television Standards Committee (NTSC), and cannot meet wide-bandwidth requirements. Application of color gamut display. The combination of phosphor powder and silica gel is also prone to performance aging problems. [0004] 2. Blue light, purple light or near ultraviolet...

AI Technical Summary

Problems solved by technology

Similarly, the combination of phosphor powder and silica gel is prone to performance aging problems, and may also cause color deviation due to the different degrees of performance degradation of red phosphor powder and green phosphor powder.

[0005] 3. Blue LED chips combined with II-VI groups such as CdSe/ZnS or III-V group core-shell structure quantum dot crystal powders and thin films such as InP/ZnS: This technical solution has been mass-produced in a small amount, and the advantage is that it can improve the color gamut. It reaches the NTSC standard of 105%, but the light efficiency is poor, and the core-shell structure needs to be made, and the environmental stability and mechanical stability are very poor. It needs special anti-humidity and anti-oxidation treatment, which is prone to quantum dot displacement and has a short

Images