Light guide plate with curved V-groove patterns in edge-lit backlight

Study on light guide plate design technology for improving optical efficiency of flat-type lighting device

“…Therefore, adopting an optimal pattern to improve the optical efficiency characteristics of the LGP of a device is an important design measure. Based on the results of previous studies, 21 – 26 , 29 the V-groove pattern size used in the simulation was designed to have a width and depth of 0.5 mm. This was similar to the ratio of the pattern size processed in the LPG using an actual laser, i.e., 504×545 μm (width × depth).…”

“…The trend of the light loss inside the LGP was identified for 10 models, in which the viewing angle was varied to induce light rays from the light source and sufficiently deliver them to the corners of the LGP. While conducting preliminary research, 21 – 26 , 29 we analyzed the results from various perspectives. Specifically, we focused on the illuminance values that varied as the viewing angle increased by 10 deg from 30 deg to 120 deg for each pattern interval.…”

“…Therefore, current research and development aim to adjust the emitted light of LEDs during diffusion efficiently 11 – 31 …”

Fabrication of Polymer Light Guide Plate (LGP) using Direct CO2 Laser Structuring

“…Although LED-based lighting has advantages, it also comes with a weakness: it has non-uniformity luminance difficulty. To counter the problems, LGP plays an essential role in enhancing the luminance and uniformity of LCDs [18].…”