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Session 93 :
Stretchable Displays
Flexible Displays and e-Paper

Friday, May 17 / 10:40 AM   - 12:20 PM / San Jose Convention Center, LL21EF

Chair:
Yong Taek Hong, Seoul National University, Seoul, South Korea

Co-Chair:
Chan-Il Park, LG Display Co. Ltd., Seoul, South Korea

93.1 - Invited Paper: Meta-Elastomer for Biaxially Stretchable Displays Without Image Distortion (10:40 AM - 11:00 AM)
  • Seungjun Chung, Jun-Chan Choi
    Korea University Seoul South Korea


  • Image distortion issues in stretchable displays caused by undesired substrate deformations during stretching remain challenging problems. Here, the authors propose meta-elastomers with biaxially zero Poisson's ratio for distortion-free stretchable displays. To program the Poisson's ratio according to biaxial stretching, an elastomeric mechanical metamaterial (MM) frame with a negative Poisson's ratio is integrated into an elastomer matrix. By leveraging competitive interactions between the elastomeric MM frame and elastomer matrix deformation, the authors successfully implement the biaxial near-zero Poisson's ratio, which is challenging in the existing tessellated rigid MM.
05/17/2024 10:40 AM 05/17/2024 11:00 AM America/Los_Angeles Meta-Elastomer for Biaxially Stretchable Displays Without Image Distortion Image distortion issues in stretchable displays caused by undesired substrate deformations during stretching remain challenging problems. Here, the authors propose meta-elastomers with biaxially zero Poisson's ratio for distortion-free stretchable displays. To program the Poisson's ratio according to biaxial stretching, an elastomeric mechanical metamaterial (MM) frame with a negative Poisson's ratio is integrated into an elastomer matrix. By leveraging competitive interactions between the elastomeric MM frame and elastomer matrix deformation, the authors successfully implement the biaxial near-zero Poisson's ratio, which is challenging in the existing tessellated rigid MM. San Jose McEnery Convention Center LL21EF Seungjun Chung, Jun-Chan Choi
93.2 - Highly Stretchable Liquid Metal-Based Deformable MicroLED Displays (11:00 AM - 11:20 AM)
  • Masashi Miyakawa, Hiroshi Tsuji, Tatsuya Takei, Yoshihide Fujisaki, Mitsuru Nakata
    NHK Science & Technology Research Laboratories Tokyo Japan

  • Toshihiro Yamamoto
    NHK Foundation Tokyo Japan


  • A highly stretchable liquid metal-based stretchable backplane technology is developed for deformable microLED displays. The authors developed a fine liquid-metal patterning process and a highly stretchable backplane fabrication technology to implement microLED stretchable displays, which were successfully deformed from planar to hemispherical shapes with up to 50% stretchability without disconnection of pixels.
05/17/2024 11:00 AM 05/17/2024 11:20 AM America/Los_Angeles Highly Stretchable Liquid Metal-Based Deformable MicroLED Displays A highly stretchable liquid metal-based stretchable backplane technology is developed for deformable microLED displays. The authors developed a fine liquid-metal patterning process and a highly stretchable backplane fabrication technology to implement microLED stretchable displays, which were successfully deformed from planar to hemispherical shapes with up to 50% stretchability without disconnection of pixels. San Jose McEnery Convention Center LL21EF Toshihiro Yamamoto
93.3 - Kerfed Pillar Platform for Deformable Double-Curvature Display (11:20 AM - 11:40 AM)
  • Jaehyeock Chang, Hagseon Kim, Kyung Cheol Choi
    Korea Advanced Institute of Science and Technology (KAIST) Daejeon South Korea


  • This study presents a kerfed pillar platform for deformable double-curvature displays, designed for a smooth transition between 2D and complex 3D shapes, like spheres and saddles, while maintaining structural integrity. The kerfs modify the flexible substrate into a pillar-island structure, which enhances substrate compressibility, preventing crumpling during 3D curve transformation. This methodology exemplifies controlled deformation, adhering to the superposition principle, and enabling diverse display configurations.
05/17/2024 11:20 AM 05/17/2024 11:40 AM America/Los_Angeles Kerfed Pillar Platform for Deformable Double-Curvature Display This study presents a kerfed pillar platform for deformable double-curvature displays, designed for a smooth transition between 2D and complex 3D shapes, like spheres and saddles, while maintaining structural integrity. The kerfs modify the flexible substrate into a pillar-island structure, which enhances substrate compressibility, preventing crumpling during 3D curve transformation. This methodology exemplifies controlled deformation, adhering to the superposition principle, and enabling diverse display configurations. San Jose McEnery Convention Center LL21EF Jaehyeock Chang, Hagseon Kim, Kyung Cheol Choi
93.4 - Evaluation Method and Results for Measuring Stretchability of Two-Dimensional Stretchable Display (11:40 AM - 12:00 PM)
  • Myung Sub Lim, Chan Il Park, Haeyoon Jung, SungJoon Min, Taehyun Kim, JunHyuk Song, Yeonjun Oh, Injun Lee, Yu Ra Jeong, Dojoong Kim, Aesun Kim, Hyokang Lee, Gi-Hong Kim, Joon-Young Yang, Sooyoung Yoon
    LG Display Co., Ltd. Seoul South Korea


  • The authors investigate the relationship between unidirectional and bidirectional stretch for stretchable displays and propose an evaluation method to determine the performance factors for these displays. Their study specifically focuses on evaluating the performance of a 100ppi microLED stretchable display. With this evaluation, the authors demonstrate stretching repetitions of more than 1,000 times at 20%.
05/17/2024 11:40 AM 05/17/2024 12:00 PM America/Los_Angeles Evaluation Method and Results for Measuring Stretchability of Two-Dimensional Stretchable Display The authors investigate the relationship between unidirectional and bidirectional stretch for stretchable displays and propose an evaluation method to determine the performance factors for these displays. Their study specifically focuses on evaluating the performance of a 100ppi microLED stretchable display. With this evaluation, the authors demonstrate stretching repetitions of more than 1,000 times at 20%. San Jose McEnery Convention Center LL21EF Myung Sub Lim, Chan Il Park, Haeyoon Jung, SungJoon Min, Taehyun Kim, JunHyuk Song, Yeonjun Oh, Injun Lee, Yu Ra Jeong, Dojoong Kim, Aesun Kim, Hyokang Lee, Gi-Hong Kim, Joon-Young Yang, Sooyoung Yoon
93.5 Late-News Paper: Highly Stretchable Display with Serpentine-Shaped Design and Intrinsically Stretchable Materials (12:00 PM - 12:20 PM)
  • Jangyeol Yoon, Seongwon Kim, Woosuk Seo, Jong-Ho Hong, Yongjo Kim
    Samsung Display Co., Ltd. Yongin South Korea

  • Gyujeong Lee, Heonjung Shin, Changhee Lee
    Samsung Display Co., Ltd. South Korea


  • Stretchable displays based on conventional materials exhibit a trade-off relationship between the pixel density and the stretchability. In this paper, the authors have demonstrated overcoming the technology limitations of stretchable displays through the optimization of serpentine-shaped bridge design and the application of stretchable metal electrodes. The application of stretchable electrodes has increased stretchability by over 30% without compromising pixel density.
05/17/2024 12:00 PM 05/17/2024 12:20 PM America/Los_Angeles Highly Stretchable Display with Serpentine-Shaped Design and Intrinsically Stretchable Materials Stretchable displays based on conventional materials exhibit a trade-off relationship between the pixel density and the stretchability. In this paper, the authors have demonstrated overcoming the technology limitations of stretchable displays through the optimization of serpentine-shaped bridge design and the application of stretchable metal electrodes. The application of stretchable electrodes has increased stretchability by over 30% without compromising pixel density. San Jose McEnery Convention Center LL21EF Gyujeong Lee, Heonjung Shin, Changhee Lee