Session and scheduling information are listed below. Select a session from the list and press "Go" to view the abstracts for that session.
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Session
94
: Acoustic Applications |
Emerging Technologies and Applications
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Friday, May 17 / 10:40 AM - 11:40 AM / San Jose Convention Center, LL20BC
Chair:
Adi Abileah, Adi - Displays Consulting LLC, Portland, OR US
Co-Chair:
Fang-Cheng Lin, Apple, Inc., Cupertino, CA USA
94.1 - Study on the Listening Room Sound Quality of OLED Thin-Actuator Panel Speaker (10:40 AM - 11:00 AM)
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JeongMan Lee, JaeHong Kim, Jang Jin Yoo
LG Display Seoul South Korea
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Thin and light design, picture quality, and sound quality are important factors in TVs and monitors. Recently, a monitor speaker has been developed that provides a new sound experience by vibrating the OLED display using a thin actuator and general woofer. However there are limitations in evaluating sound quality of this technology because the existing international standards are speaker unit evaluation methods based on an anechoic chamber environment. In this study, the authors propose a sound quality measurement method that can reflect the listening environment of monitor customers based on the new IEC standard, and share the results of an OLED thin-actuator panel speaker.
94.2 - Improved Simulation Accuracy for a Front-Firing Panel Speaker (FFPS) with Thin Actuator by Adopting Frequency-Dependent Viscoelastic Properties (11:00 AM - 11:20 AM)
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Eun Roh, Sangwoo Jin, Nohjin Myung, Seungryull Park
LG Display Co., Ltd. Seoul South Korea
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In this study, the authors examine methods to enhance the simulation accuracy of front-firing panel speakers (FFPS) based on thin actuators. Specifically, they investigate the frequency-dependent behavior of adhesives’ viscoelastic properties. By leveraging the time-temperature superposition (TTS) principle, they can accurately determine the material properties at audio frequencies and integrate them into the simulation process. The authors anticipate that their finding will enhance the efficiency of the design process for FFPS and its display components by simulating more accurate results.
94.3 - 60kHz Ultrasonic Actuators for Animal-Friendly Haptic Displays (11:20 AM - 11:40 AM)
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Seung Hyun Sung, Yu-Seon Kho, Seungryull Park
LG Display Co., Ltd. Seoul South Korea
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An enhanced piezoelectric coefficient (d33) and mechanical quality factor (Qm) are prerequisites for the high performance of resonant piezoelectric applications (e.g., ultrasound haptic displays). The authors present high-performance piezoelectric actuators with a resonant frequency of 60 kHz, beyond audible ranges for animals. The ultrasonic actuators provide sufficient tactile feedback with a high vibration displacement, which is superior to that of many state-of-the-art commercial actuators without any visible damage in plastic organic light-emitting diode (POLED) displays. Furthermore, the actuators can be assembled into an ultrasound loudspeaker, which could facilitate directional private sound for high-end automotive applications.