Light-emitting device, backlight module and display apparatus

By using a blue light element and a wavelength conversion section in the light-emitting device, and incorporating β-SiAlON green powder and phosphor additives, the emission spectrum is optimized, solving the problem of insufficient luminous performance of β-SiAlON phosphor. This results in a light-emitting device with narrow half-width and high color gamut, suitable for display devices.

WO2026117977A1 Publication Date: 2026-06-11FOSHAN NATIONSTAR OPTOELECTRONICS CO LTD
5 Cites 0 Cited by

Patent Information

Application Number
PCT/CN2024/136802
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-12-04
Publication Date
2026-06-11

AI Technical Summary

Technical Problem

In the existing technology, the luminescence performance of β-SiAlON phosphor needs further optimization, and it is difficult to achieve light-emitting devices with narrow full width at half maximum and high color gamut.

Method used

The method employs a blue light-emitting element combined with a wavelength conversion section. The wavelength conversion section includes a red-based phosphor, an encapsulating adhesive, and a phosphor composition. The phosphor composition includes β-SiAlON green powder and phosphor additives, such as neodymium-containing inorganic compounds and/or neodymium-containing organic compounds, to optimize the emission spectrum and achieve a narrow full width at half maximum (FWHM) and a high color gamut.

Benefits of technology

It achieves narrow half-width at half-maximum, stable luminous performance and high color gamut of light-emitting devices, with a color temperature of over 6000K, an NTSC color gamut of over 80%, a DCI-P3 color gamut of over 90%, and good color coordinate stability.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present application provides a light-emitting device. An emission spectrum of the light-emitting device comprises a main emission peak, and a first emission peak and a first emission valley respectively distributed on two sides of the main emission peak; the peak wavelength of the main emission peak ranges from 520 nm to 550 nm, and the full width at half maximum ranges from 30 nm to 60 nm; the peak wavelength of the first emission peak ranges from 500 nm to 530 nm; the valley wavelength of the first emission valley ranges from 550 nm to 610 nm. A wide color gamut light-emitting device having a narrow full width at half maximum and stable light-emitting performance can be obtained.
Need to check novelty before this filing date? Find Prior Art