23‐3: Distinguished Paper: The New Route for Realization of 1µm‐pixel‐pitch High Resolution Displays

2019 ◽  
Vol 50 (1) ◽  
pp. 319-321 ◽  
Author(s):  
Ji Hun Choi ◽  
Jong-Heon Yang ◽  
Jae-Eun Pi ◽  
Chi-Young Hwang ◽  
Yong-Hae Kim ◽  
...  
Keyword(s):  
High Resolution ◽  
Pixel Pitch

19-6: Invited Paper : A Novel Process for Fabricating High-Resolution and Very Small Pixel-pitch GaN LED Microdisplays

2017 ◽  
Vol 48 (1) ◽  
pp. 268-271 ◽  
Author(s):  
François Templier ◽  
Lamine Benaïssa ◽  
Bernard Aventurier ◽  
Christine Di Nardo ◽  
Matthew Charles ◽  
...  
Keyword(s):  
High Resolution ◽  
Gan Led ◽  
Pixel Pitch ◽  
Small Pixel

High-resolution active-matrix 10-um pixel-pitch GaN LED microdisplays for augmented reality applications

2018 ◽  
Author(s):  
Francois Templier ◽  
Ludovic Dupré ◽  
Bertrand Dupont ◽  
Anis Daami ◽  
Bernard Aventurier ◽  
...  
Keyword(s):  
High Resolution ◽  
Augmented Reality ◽  
Active Matrix ◽  
Gan Led ◽  
Pixel Pitch

Modular 64×64 CdZnTe Arrays With Multiplexer Readout for High-Resolution Nuclear Medicine Imaging

1997 ◽  
Vol 487 ◽  
Author(s):  
J. M. Woolfenden ◽  
H. B. Barber ◽  
H. H. Barrett ◽  
E. L. Dereniak ◽  
J. D. Eskin ◽  
...  
Keyword(s):  
Nuclear Medicine ◽  
High Resolution ◽  
Spatial Resolution ◽  
Personal Computer ◽  
Imaging System ◽  
Radiation Detectors ◽  
Readout Circuit ◽  
Nuclear Medicine Imaging ◽  
Pixel Pitch

AbstractWe are developing modular arrays of CdZnTe radiation detectors for high-resolution nuclear medicine imaging. Each detector is delineated into a 64×64 array of pixels; the pixel pitch is 380 jim. Each pixel is connected to a corresponding pad on a multiplexer readout circuit. The imaging system is controlled by a personal computer. We obtained images of standard nuclear medicine phantoms in which the spatial resolution of approximately 1.5 mm was limited by the collimator that was used. Significant improvements in spatial resolution should be possible with different collimator designs. These results are promising for high-resolution nuclear medicine imaging.

scholarly journals The new route for realization of 1‐μm‐pixel‐pitch high‐resolution displays

2019 ◽  
Vol 27 (8) ◽  
pp. 487-496 ◽  
Author(s):  
Ji Hun Choi ◽  
Jong‐Heon Yang ◽  
Jae‐Eun Pi ◽  
Chi‐Young Hwang ◽  
Yong‐Hae Kim ◽  
...  
Keyword(s):  
High Resolution ◽  
Pixel Pitch

Modular 64×64 CdZnTe Arrays With Multiplexer Readout for High-Resolution Nuclear Medicine Imaging

1997 ◽  
Vol 484 ◽  
Author(s):  
J. M. Woolfenden ◽  
H. B. Barber ◽  
H. H. Barrett ◽  
E. L. Dereniak ◽  
J. D. Eskin ◽  
...  
Keyword(s):  
Nuclear Medicine ◽  
High Resolution ◽  
Spatial Resolution ◽  
Personal Computer ◽  
Imaging System ◽  
Radiation Detectors ◽  
Readout Circuit ◽  
Nuclear Medicine Imaging ◽  
Pixel Pitch

AbstractWe are developing modular arrays of CdZnTe radiation detectors for high-resolution nuclear medicine imaging. Each detector is delineated into a 64×64 array of pixels; the pixel pitch is 380 ptm. Each pixel is connected to a corresponding pad on a multiplexer readout circuit. The imaging system is controlled by a personal computer. We obtained images of standard nuclear medicine phantoms in which the spatial resolution of approximately 1.5 mm was limited by the collimator that was used. Significant improvements in spatial resolution should be possible with different collimator designs. These results are promising for high-resolution nuclear medicine imaging.

scholarly journals Photovoltaic retinal prosthesis restores high-resolution responses to single-pixel stimulation in blind retinas

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Naïg Aurelia Ludmilla Chenais ◽  
Marta Jole Ildelfonsa Airaghi Leccardi ◽  
Diego Ghezzi
Keyword(s):  
High Resolution ◽  
Ganglion Cells ◽  
Artificial Vision ◽  
Wide Field ◽  
Retinal Ganglion ◽  
Retinal Neurons ◽  
Retinal Prostheses ◽  
Retinal Stimulation ◽  
Single Pixel ◽  
Pixel Pitch

AbstractRetinal prostheses hold the promise of restoring vision in totally blind people. However, a decade of clinical trials highlighted quantitative limitations hampering the possibility of reaching this goal. A key challenge in retinal stimulation is to independently activate retinal neurons over a large portion of the subject’s visual field. Reaching such a goal would significantly improve the perception accuracy in retinal implants’ users, along with their spatial cognition, attention, ambient mapping and interaction with the environment. Here we show a wide-field, high-density and high-resolution photovoltaic epiretinal prosthesis for artificial vision (POLYRETINA). The prosthesis embeds 10,498 physically and functionally independent photovoltaic pixels, allowing for wide retinal coverage and high-resolution stimulation. Single-pixel illumination reproducibly induced network-mediated responses from retinal ganglion cells at safe irradiance levels. Furthermore, POLYRETINA allowed response discrimination with a high spatial resolution equivalent to the pixel pitch (120 µm) thanks to the network-mediated stimulation mechanism. This approach could allow mid-peripheral artificial vision in patients with retinitis pigmentosa.

scholarly journals Front-Inner Lens for High Sensitivity of CMOS Image Sensors

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1536 ◽  
Author(s):  
Godeun Seok ◽  
Yunkyung Kim
Keyword(s):  
High Resolution ◽  
Aspect Ratio ◽  
High Sensitivity ◽  
Image Sensor ◽  
Image Sensors ◽  
Optical Simulation ◽  
Optical Performance ◽  
Pixel Size ◽  
Cmos Image Sensors ◽  
Pixel Pitch

Due to the continuing improvements in camera technology, a high-resolution CMOS image sensor is required. However, a high-resolution camera requires that the pixel pitch is smaller than 1.0 μm in the limited sensor area. Accordingly, the optical performance of the pixel deteriorates with the aspect ratio. If the pixel depth is shallow, the aspect ratio is enhanced. Also, optical performance can improve if the sensitivity in the long wavelengths is guaranteed. In this current work, we propose a front-inner lens structure that enhances the sensitivity to the small pixel size and the shallow pixel depth. The front-inner lens was located on the front side of the backside illuminated pixel for enhancement of the absorption. The proposed structures in the 1.0 μm pixel pitch were investigated with 3D optical simulation. The pixel depths were 3.0, 2.0, and 1.0 μm. The materials of the front-inner lens were varied, including air and magnesium fluoride (MgF2). For analysis of the sensitivity enhancement, we compared the typical pixel with the suggested pixel and confirmed that the absorption rate of the suggested pixel was improved by a maximum of 7.27%, 10.47%, and 29.28% for 3.0, 2.0, and 1.0 μm pixel depths, respectively.

A Large Area, High-Resolution a-Si:H Array for X-Ray Imaging

1994 ◽  
Vol 336 ◽  
Author(s):  
L.E. Antonuk ◽  
Y. El-Mohri ◽  
W. Huang ◽  
J. Siewerdsen ◽  
J. Yorkston ◽  
...  
Keyword(s):  
High Resolution ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Frame Rate ◽  
Large Area ◽  
X Ray ◽  
X Ray Imaging ◽  
Pixel Pitch ◽  
Resolution Requirements ◽  
Good Agreement

ABSTRACTThe development of a large area, high-resolution, a-Si:H x-ray imager is reported. The array has 1536×1920 pixels, a pixel pitch of 127μm, and an area of 19.5×24.4 cm2. Tne array is tailored to the high frame rate and high spatial resolution requirements of diagnostic x-ray imaging. The design of this array is presented and examples of x-ray images are illustrated. Initial Measurements of the sensor capacitance and pixel time constant properties are in good agreement with theoretical expectations. These results indicate that high-resolution arrays of this construction are capable of providing fluoroscopic images at rates of at least 30 frames per second.

Observations of the spatial structure of interstellar hydrogen

1967 ◽  
Vol 31 ◽  
pp. 45-46
Author(s):  
Carl Heiles
Keyword(s):  
High Resolution ◽  
Spatial Structure ◽  
Velocity Dispersion ◽  
Temperature Variations

High-resolution 21-cm line observations in a region aroundlII= 120°,b11= +15°, have revealed four types of structure in the interstellar hydrogen: a smooth background, large sheets of density 2 atoms cm-3, clouds occurring mostly in groups, and ‘Cloudlets’ of a few solar masses and a few parsecs in size; the velocity dispersion in the Cloudlets is only 1 km/sec. Strong temperature variations in the gas are in evidence.

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