LED Package Quantum Dot Band Pass Filter 3D Display

The patent applies parameter changes by replacing conventional phosphor materials with quantum dot materials that have different optical properties. Quantum dots exhibit size-dependent emission wavelengths and narrow FWHM (20-50 nm compared to phosphor's 50-100 nm), enabling precise control over light spectral characteristics. This parameter change in material composition directly resolves the contradiction by maintaining brightness while significantly improving color reproduction accuracy for 3D displays.

The patent employs composite materials by combining quantum dots with specific polymers or matrices to create quantum dot composite layers. These composite structures maintain the narrow emission spectrum of quantum dots while providing mechanical stability and processability. The composite approach enables simultaneous achievement of high brightness uniformity and precise color reproduction across different viewing angles and wavelengths.

The patent applies preliminary action by pre-engineering the quantum dot layer with specific size distributions before the 3D display operation. The quantum dots are synthesized with controlled sizes (2-10 nm) that correspond to specific emission wavelengths, and this size distribution is optimized in advance to match the required spectral separation for left and right eye images. This preliminary structural preparation eliminates the need for complex post-processing filters and ensures consistent color reproduction from the outset.

The quantum dot layer serves as an intermediary between the blue LED excitation source and the final displayed image. Instead of using conventional phosphors that emit broad spectra, the quantum dot intermediary converts the blue light into narrow-band green and red light with precise wavelength control. This intermediary layer enables the 3D display function to achieve both spectral separation for stereoscopic vision and color consistency across different wavelength channels.