Optimization of Ultrathin Backlight Unit by Using a Tapered Light Guide Film Studied by Optical Simulation

Joo, Byung-Yun; Ko, Jae‐Hyeon

doi:10.3807/copp.2017.1.2.101

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…Compared to a conventional BLM, the novel configuration achieved higher uniformity (of >90%). Kuo et al [ 25 ] determined that the optimal processing parameters in a reciprocal comparisons approach were a cooling time of 30 s, a mold temperature of 85 °C, a melt temperature of 250 °C, an injection speed of 195 mm/s, an injection pressure of 240 MPa, a packing pressure of 110 MPa, packing switching of 5 mm, and a packing time of 3 s. Joo and Ko [ 26 ] studied the micro-prism pattern negatively inscribed into an LGP’s bottom surface, which was found to be the most effective design. Xu et al [ 27 ] indicated that the luminance uniformity of a BLM depended on the microstructure distributed on the LGP’s bottom surface.…”

Section: Introductionmentioning

confidence: 99%

Optimized Micro-Pattern Design and Fabrication of a Light Guide Plate Using Micro-Injection Molding

et al. 2021

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This study examined the uniformity of illuminance field distributions of light guide plates (LGPs). First, the authors designed microstructural patterns on the surface of an LGP. Then, a mold of the LGP with the optimal microstructural design was fabricated by a photolithography method. Micro-injection molding (μIM) was used to manufacture the molded LGPs. μIM technology can simultaneously manufacture large-sized wedge-shaped LGPs and micro-scale microstructures. Finally, illuminance values of the field distributions of the LGPs with various microstructures were obtained through optical field measurements. This study compared the illuminance field distributions of LGPs with various designs and structures, which included LGPs without and those with microstructure on the primary design and the optimal design. The average illuminance of the LGP with microstructures and the optimal design was roughly 196.1 cd/m2. Its average illuminance was 1.3 times that of the LGP without microstructures. This study also discusses illuminance field distributions of LGPs with microstructures that were influenced by various μIM process parameters. The mold temperature was found to be the most important processing parameter affecting the illuminance field distribution of molded LGPs fabricated by μIM. The molded LGP with microstructures and the optimal design had better uniformity than that with microstructures and the primary design and that without microstructures. The uniformity of the LGP with microstructures and the optimal design was roughly 86.4%. Its uniformity was nearly 1.65 times that of the LGP without microstructures. The optimized design and fabrication of LGPs with microstructure exhibited good uniformity of illuminance field distributions.

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Section: Introductionmentioning

confidence: 99%

Optimized Micro-Pattern Design and Fabrication of a Light Guide Plate Using Micro-Injection Molding

et al. 2021

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“…The function of the BLU is to transform the light flux from the point or line source into the areal illuminator towards the LCD panel. Light is usually extracted from the LGP by the micro-optical structures and/or printed dots on the surface of the LGP [1][2][3][4][5][6][7][8]. Instead of modifying the surface of the LGP, several contributors have proposed the use of the scattering polymer, where the optical transmission particles inside the LGP work to extract the light [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of submicron period grating as an imprinted light guide plate for a backlight unit

Choi

2019

Journal of Information Display

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The imprinted light guide plate (LGP) fabricated through a diffractive grating was studied for the edge-lit display. Such kind of backlight unit (BLU) can save prismatic sheets. The grating dimension was determined through preliminary experiments, modeling, and computation. Based on the designed parameters, a submicron period grating was fabricated and was transferred to the LGP. Consequently, the outcoupling luminous flux, on-axis luminance, and homogeneousness and chromatic dispersion were measured through the prototyped samples. Compared to the conventional BLU, the imprinted diffractive grating works well as the light extractor but still needs to be improved to meet the illumination characteristics required for the liquid crystal display (LCD) BLU.

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Simulation study on the optical properties of hybrid films adopted in quantum-dot edge-lit backlights for LCD applications

Lee

2022

J. Korean Phys. Soc.

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Optimization of Ultrathin Backlight Unit by Using a Tapered Light Guide Film Studied by Optical Simulation

Cited by 5 publications

References 9 publications

Optimized Micro-Pattern Design and Fabrication of a Light Guide Plate Using Micro-Injection Molding

Optimized Micro-Pattern Design and Fabrication of a Light Guide Plate Using Micro-Injection Molding

Design and fabrication of submicron period grating as an imprinted light guide plate for a backlight unit

Simulation study on the optical properties of hybrid films adopted in quantum-dot edge-lit backlights for LCD applications

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