Electrostatic Ultrasonic Transducer, Ultrasonic Speaker And Display Device

2011 ◽  
Vol 129 (3) ◽  
pp. 1662
Author(s):  
Kinya Matsuzawa
Keyword(s):  
Ultrasonic Transducer ◽  
Display Device ◽  
Electrostatic Ultrasonic Transducer

A theoretical model of an electrostatic ultrasonic transducer incorporating resonating conduits

2010 ◽  
Vol 75 (5) ◽  
pp. 796-810 ◽  
Author(s):  
A. J. Walker ◽  
A. J. Mulholland
Keyword(s):  
Theoretical Model ◽  
Ultrasonic Transducer ◽  
Electrostatic Ultrasonic Transducer

A model for an electrostatic ultrasonic transducer with a grooved backplate

1992 ◽  
Vol 3 (11) ◽  
pp. 1095-1097 ◽  
Author(s):  
J Hietanen ◽  
J Stor-Pellinen ◽  
M Luukkala
Keyword(s):  
Ultrasonic Transducer ◽  
Electrostatic Ultrasonic Transducer

A silicon electrostatic ultrasonic transducer

1989 ◽  
Vol 36 (6) ◽  
pp. 620-627 ◽  
Author(s):  
K. Suzuki ◽  
K. Higuchi ◽  
H. Tanigawa
Keyword(s):  
Ultrasonic Transducer ◽  
Electrostatic Ultrasonic Transducer

scholarly journals Liquid‐immersible electrostatic ultrasonic transducer

1982 ◽  
Vol 72 (3) ◽  
pp. 1098-1098
Author(s):  
John H. Cantrell ◽  
Joseph S. Heyman ◽  
William T. Yost ◽  
Michael A. Torbett ◽  
Mack A. Breazeale
Keyword(s):  
Ultrasonic Transducer ◽  
Electrostatic Ultrasonic Transducer

Bandwidth control of an electrostatic ultrasonic transducer

1994 ◽  
Vol 45 (3) ◽  
pp. 203-208 ◽  
Author(s):  
Pentti Mattila ◽  
Jarmo Hietanen
Keyword(s):  
Ultrasonic Transducer ◽  
Bandwidth Control ◽  
Electrostatic Ultrasonic Transducer

Electrostatic ultrasonic transducer and ultrasonic speaker

2010 ◽  
Vol 128 (2) ◽  
pp. 956
Author(s):  
Shinichi Miyazaki
Keyword(s):  
Ultrasonic Transducer ◽  
Electrostatic Ultrasonic Transducer

FLAUT: A mutual sensitivity improvement through matched pipe, cavity and thin plate resonance

2021 ◽  
Vol 20 (2) ◽  
pp. 42-48
Author(s):  
Syamsul Bahrin Abdul Hamid
Keyword(s):  
Thin Plate ◽  
Laser Interferometer ◽  
Ultrasonic Transducer ◽  
Analytical Modelling ◽  
Deformation Velocity ◽  
Sensitivity Improvement ◽  
Electrostatic Transducers ◽  
Db Difference ◽  
The Individual ◽  
Electrostatic Ultrasonic Transducer

Electrostatic transducers promises a great potential in alternative to piezoelectric transducer based on certain advantages such as inherently wide bandwidth and good acoustic matching to air due to the membrane’s low acoustics impedance. There are two basic designs that are popular among electrostatic ultrasonic transducer developer – rigid backplate and micromachine backplate. This paper presents a methodology for improving the sensitivity of an air-coupled ultrasonic transducer by coupling the resonating thin plate, cavity and pipe in a single cell. The proposed device is termed Fluidically Amplified Ultrasonic Transducer (FLAUT) for an air-coupled application. Investigation of the concept of matched thin plate, cavity and pipe, of which the individual geometry is expected to mutually enhance one another. Analytical modelling is utilized to the matched thin plate, cavity and pipe. The analytical modelling identifies the required geometry for the FLAUT based on the matched operating resonant frequency of 25 kHz. At the end of the paper the prototype of FLAUT is presented where the device was fabricated using additive manufacturing process (3-D printing) which consist of a 50 µm Kapton thin film over a micro stereolithography designed backplate. Here aluminum is coated as the electrode utilizing the thermal evaporation process for both the Kapton film and the backplate. A laser interferometer is utilized to measure FLAUT thin plate displacement which indicates the device is running at 25 kHz fundamental mode. A 30 dB difference is also observed between the deformation velocity of the cavity active region and its surrounding.

Nanoparticles Generation using Mono-disperse Droplets by an Ultrasonic Transducer

2020 ◽  
Vol 140 (2) ◽  
pp. 37-42
Author(s):  
Nozomu Fujimoto ◽  
Takefumi Kanda ◽  
Masaya Katsuta ◽  
Yusaku Sakata ◽  
Yoshiaki Yamada ◽  
...  
Keyword(s):  
Ultrasonic Transducer

Estimating OLED Display Device Lifetime from pixel and screen brightness and its application

2019 ◽  
Vol 2019 (1) ◽  
pp. 331-338 ◽  
Author(s):  
Jérémie Gerhardt ◽  
Michael E. Miller ◽  
Hyunjin Yoo ◽  
Tara Akhavan
Keyword(s):  
Image Processing ◽  
Power Consumption ◽  
Model Parameters ◽  
Display Device ◽  
Image Processing Algorithm ◽  
Pixel Value ◽  
Device Lifetime ◽  
The Impact ◽  
Oled Display

In this paper we discuss a model to estimate the power consumption and lifetime (LT) of an OLED display based on its pixel value and the brightness setting of the screen (scbr). This model is used to illustrate the effect of OLED aging on display color characteristics. Model parameters are based on power consumption measurement of a given display for a number of pixel and scbr combinations. OLED LT is often given for the most stressful display operating situation, i.e. white image at maximum scbr, but having the ability to predict the LT for other configurations can be meaningful to estimate the impact and quality of new image processing algorithms. After explaining our model we present a use case to illustrate how we use it to evaluate the impact of an image processing algorithm for brightness adaptation.

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