LED Light Source with Dual-Waveform Blue Chip and Red Component

The patent combines the blue light emitting chip and green phosphor into a single integrated structure. The blue light chip serves dual purposes: directly emitting blue light and exciting green phosphor to emit green light. This merging reduces the number of separate components from three chips to two chips plus phosphor, thereby reducing manufacturing cost while maintaining the ability to produce all three primary colors (blue, green, red) for wide viewing distance adaptability.

The patent applies local quality by using different phosphor materials with specific characteristics in different locations. Specifically, green phosphor with narrow half-wave width (FWHM ≤ 50nm) is selected and positioned to receive blue light excitation, while red phosphor is positioned to receive green light excitation. This selective placement and material choice ensures that each phosphor contributes optimally to the overall color gamut, achieving pure green light emission and high NTSC color gamut coverage (≥90%) while maintaining cost effectiveness.

The patent achieves universality by designing a multi-functional blue light emitting chip that simultaneously performs three functions: (1) emits blue light directly for display, (2) excites green phosphor to produce green light, and (3) its emitted light serves as the excitation source for the phosphor layer. This multi-functional design eliminates the need for separate green light chips, reducing manufacturing complexity while achieving high NTSC color gamut coverage through the use of green phosphor with narrow half-wave width.