Reliability of Flexible Display by Simulation and Strain Gauge Test

Chen, Quayle; Xu, Leon; Salo, Antti; Neto, Gustavo; Freitas, G.

doi:10.1109/eptc.2008.4763455

Cited by 6 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accordingly, the transverse normal strain zz ε is zero and both transverse shear strains xz ε and yz ε are zero. According to generalized Hooke's law for an orthotropic material in the midplane, the governing equation is expressed by (10) ( ) where φ is an Airy stress function, w is the deflection of the flexible substrate, = x y E E E , and…”

Section: Model Of Flexible Substratementioning

confidence: 99%

See 1 more Smart Citation

Torsional Analysis and Measurement for Flexible Displays

Lee

Liu

2011

JMMP

View full text Add to dashboard Cite

To display information, flexible displays are a promising device. We present energy methods in conjunction with the calculus of variation to obtain deflections of flexible substrates subject to torque. In addition to analytical derivation, in experiments an electric motor under computer control exerts torque to generate display torsion, whose twist angles are obtained by using both optical encoder measurement and theoretical calculation. Comparisons are made between experimental and theoretical results for PET (polyethylene terephthalate) and PEN (polyethylene naphthalate) polymer substrates. Both experimental and theoretical results show that the required torque due to unit twist angle increases with the twist angle. A larger PET substrate is not as easy to be twisted as smaller one. In addition, a square PET substrate is not as easy to be twisted as rectangular one with the same width.

show abstract

Section: Model Of Flexible Substratementioning

confidence: 99%

“…They investigated residual stresses and failure for several dielectric coating/polymer substrate combinations of flexible electronics. Chen et al (9) (10) have studied the mechanical performance of flexible displays.…”

Section: Introductionmentioning

confidence: 99%

Torsional Analysis and Measurement for Flexible Displays

Lee

Liu

2011

JMMP

View full text Add to dashboard Cite

show abstract

“…There is scarce literature on modeling and measurement of flexible layered structures subjected to a torque. Chen et al 10,11 have developed flexible electronic products. They investigated flexible display module reliability with experiments and simulations, such as bending, twist, and ball drop.…”

Section: Introductionmentioning

confidence: 99%

Deformation of Multilayer Flexible Electronics Subjected to Torque

Lee

Liu

2011

Experimental Techniques

View full text Add to dashboard Cite

Flexibility is one of remarkable characteristics of flexible electronics. Therefore, the analysis of flexible electronics deformation caused by external torques will help its design. In this work, analytical derivation is conducted for flexible electronics treated as multilayer structures. In experiments, an electric motor under computer control exerts a torque to generate torsion, whose twist angles are obtained by using both optical encoder measurement and theoretical calculation. Comparisons are made between experimental and theoretical results for bare PEN (polyethylene naphthalate) substrates of different sizes, multilayer PET (polyethylene terephthalate) substrates, and ITO (indium tin oxide)‐coated PET substrates. Finally, a laser displacement sensor is used to measure the out‐of‐plane deformation for validating the proposed theoretical model.

show abstract