P‐8.3: Novel Rolling Hinge for Rollable Mobile Device

Han, Ho Jung; Park, Hyun Min; Hwang, In-Sun

doi:10.1002/sdtp.15321

Cited by 4 publications

(3 citation statements)

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“…In succession, many companies are developing various form factor devices such as multi-foldable, slidable (or rollable) and large size foldable device [1][2][3]. In 2020 Lenovo announced their foldable laptop notebook PC, ThinkPad X1 Fold 2020.…”

Section: Introductionmentioning

confidence: 99%

P‐138: High Torque Hinge for Large Size Foldable Device

Lee¹,

Park²,

Hwang³

2022

Symp Digest of Tech Papers

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In order to expand the mobile foldable technology to large size IT device, we have developed a folding hinge having high torque value. It has stress‐free folding characteristics by virtual axis structure and compact dimension by the parallel arrangement of a folding part and a torque part. Therefore, we can make a large size foldable device which is slim and narrow bezel. It has the torque value of 14 kgf·cm on device and free‐stop function. By the enlargement of friction area by the change of CAM concept and the structural optimization we can reduce abrasion of hinge CAM surface, and the torque reduction by 70k folding lifetime test is less than 20% of its initial value. It is very important progress in the foldable technology.

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Section: Introductionmentioning

confidence: 99%

P‐138: High Torque Hinge for Large Size Foldable Device

Lee¹,

Park²,

Hwang³

2022

Symp Digest of Tech Papers

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“…Among the aspects of form factor, rollability is particularly attractive due to its high portability with extendibility and flexibility under extreme daily conditions. [ 16 , 17 , 18 , 19 ] Prior studies have used paper, [ 20 , 21 ] silicon rubber, [ 22 ] and soft polymeric material [ 23 , 24 , 25 , 26 ] to realize a rollable form factor. However, rollability has still been restricted in these studies due to the poor durability and flexibility of the materials when being rolled up and out.…”

Section: Introductionmentioning

confidence: 99%

Controllable Physical Synergized Triboelectricity, Shape Memory, Self‐Healing, and Optical Sensing with Rollable Form Factor by Zn cluster

et al. 2022

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To build devices offering users comfortable experience, it is important to focus on form factor and multifunctionality. In this study, for the first time, multifunctional Zn clusters with shape memory, self‐healing, triboelectricity, and optical sensing synergized with rollable form factor are designed and fabricated by coordinating COO− and Zn2+. As pore forming agent, Zn clusters produce hierarchical porous structure depending on Zn amount. Zn clusters are applied as message transmitters and charge containers in optical sensing and corona charge injection, respectively. Moreover, Zn clusters in PVB‐COO‐Zn serve as positive tribomaterial due to Zn ion doping effect, increasing the output performance as the Zn amount reaches 20 wt%. In addition, injecting positive charge into PVB‐COO‐Zn 20 lead to more than 24 times increase in output performance compared to those of non‐porous structures. The reversibility of Zn clusters endows shape memory and self‐healing, synergized with the rollable form factor. The rollability is implemented using the long alkyl chain and the energy absorption of porous structure, providing damage resistance. The advancements in this work provide opportunities for multifunctional and unique applications (shape memory rotating‐triboelectric nanogenerator, rollable self‐healing touchpad, hidden tag) synergized with rollability that accomplishes working in broadened condition in near future.

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“…In succession, many companies are developing various form factor devices such as multi-foldable, slidable (or rollable) and large size foldable device. [1][2][3] In 2021 Huawei announced their Mate X2 foldable device. [4] In contrast to Huawei's previous foldable products, Mate X and Mate Xs, which are out-foldable devices, Mate X2 is an in-foldable device.…”

Section: Introductionmentioning

confidence: 99%

P‐7.2: Water‐drop Shape Folding Hinge for Foldable Device

Lee¹,

Park²,

Hwang³

2022

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In the past 3 years, there is big progress of the foldable display device, so nowadays it has better durability, usability and appearance. As a result, it takes more attraction of customers in the market. In order to persist and expand this trend, we need to develop a water‐drop shape folding hinge to make device which has better appearance, flat and slim. But it has some technical issues such as more folding stress, space occupation, folding trace and so on. We have reviewed those and find optimized design of a water‐drop shape folding hinge. We have made device mock‐ups and evaluated its performance. It could be taken more attraction of customers in the market.

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P‐8.3: Novel Rolling Hinge for Rollable Mobile Device

Cited by 4 publications

References 0 publications

P‐138: High Torque Hinge for Large Size Foldable Device

P‐138: High Torque Hinge for Large Size Foldable Device

Controllable Physical Synergized Triboelectricity, Shape Memory, Self‐Healing, and Optical Sensing with Rollable Form Factor by Zn cluster

P‐7.2: Water‐drop Shape Folding Hinge for Foldable Device

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