Theoretical and experimental investigation of an ultrathin optical polymer light guide plate during continuous injection direct rolling

Feng, Yanfeng; Lou, Yan; Lei, Qunan

doi:10.1007/s00170-020-06410-7

Cited by 2 publications

(2 citation statements)

References 24 publications

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“…Its uniformity was nearly 1.65 times that of the LGP without microstructures. The uniformity obtained by this result was better than the result in several references [ 13 , 23 , 27 , 31 , 46 ] and was slightly less than results of other references [ 14 , 21 , 24 , 37 , 45 ]. The authors made comparisons with previous results, and this study optimized the design of the microstructures of the LGP, the uniformity of which could be the most effective BLM application.…”

Section: Resultscontrasting

confidence: 72%

“…Yoo et al [ 36 ] presented a retinal-projection-based near-eye display with switchable multiple viewpoints by polarization-multiplexing. Feng et al [ 37 ] evaluated the influence of heat radiation, heat conduction, and plastic deformation, a novel temperature model of the injection rolling zone during continuous-injection direct rolling. The average light transmittance was 88.32% and average reflectance was 8.7%.…”

Section: Introductionmentioning

confidence: 99%

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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: Resultscontrasting

confidence: 72%

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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Microstructure-Forming Mechanism of Optical Sheet Based on Polymer State Transition in Injection-Rolling Process

2021

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Polymeric optical sheets are significant components in large-scale display devices and are difficult to fabricate due to small size and high accuracy of large-area microstructures. As a newly developed molding technique, injection-rolling is capable of continuously and efficiently achieving large-area microstructures on the polymer surface with short time and high replication. However, the microstructure-forming mechanism during the injection-rolling process has not been fully understood. In this paper, a three-dimensional steady-state heat-flow coupling simulation model of the injection-rolling zone was established to obtain the distributions of the polymer state transition interfaces. According to the state transition interfaces, the entire microstructure-forming process was numerically simulated by dividing into filling and embossing stages to systematically analyze the effects of the polymer state transition interface on filling rate. After this, the relationship between process parameters such as injection temperature, rolling speed, and roll temperature and polymer state transition interface was investigated to develop a position prediction model of the state transition interface. In addition, the optical sheet injection-rolling experiments were also carried out to reveal that the filling rate of the microstructures on the optical sheet can be affected by varying the positions of the state transition interfaces. Therefore, the microstructure-forming mechanism could be revealed as theoretical guidance for the subsequent injection-rolling production with high quality and high efficiency.

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Theoretical and experimental investigation of an ultrathin optical polymer light guide plate during continuous injection direct rolling

Cited by 2 publications

References 24 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

Microstructure-Forming Mechanism of Optical Sheet Based on Polymer State Transition in Injection-Rolling Process

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