2results about How to "Avoid excitation" patented technology

The invention relates to the technical field of display, in particular to a display panel, a preparation method of the display panel and a display device. The display panel includes: a substrate; the pixel limiting layer is positioned on one side of the substrate and is provided with a plurality of pixel openings; the dams are located on the side, away from the substrate, of the pixel limiting layer, and at least one dam is arranged on the outer side of at least part of the pixel openings; and the reflective layer at least covers the side wall, close to one side of the corresponding pixel opening, of the dam. The dams are arranged on the outer sides of the pixel openings, and the reflective layers covering the sides, close to the corresponding pixel openings, of the dams are arranged, so that large-angle light source reflection can be achieved, the divergence range is reduced, adjacent quantum dots are prevented from being excited, the problem of light crosstalk is solved, chromaticity uniformity is improved, and a good display effect is guaranteed.

This invention proposes a gallium nitride-based semiconductor laser with a gradient optical field waveguide layer. The fitting curves of the In ion intensity distribution or In atom concentration distribution, refractive index distribution, and optical absorption coefficient distribution obtained from SIMS testing of both the upper and lower waveguide layers satisfy any one of the ExpGro1, ExpGro2, ExpGro3, and Shah functions. This allows for the synergistic control of optical field confinement, loss suppression, and carrier distribution, thereby regulating the laser's optical field distribution. The fabricated gradient refractive index waveguide layer, satisfying the relevant function distribution, confines photons generated by the active layer within the waveguide, smoothing the optical field within the waveguide layer. This eliminates reflection and scattering losses caused by abrupt refractive index differences at the interface, reduces light field penetration into the confinement layer, lowers optical leakage and threshold losses, suppresses the excitation of higher-order transverse modes, achieves stable fundamental mode output, improves the laser's mode stability and beam quality factor, and reduces the horizontal divergence angle.