<title>Optimum optical geometry for recording a full-color transmission type holographic screen of large size</title>

Holographic projection is a simple projection as it enlarges or reduces reconstructed images without using a zoom lens. However, one major problem associated with this projection is the deterioration of image quality as the reconstructed image enlarges. In this paper, we propose a time-division holographic projection, in which the original image is divided into blocks and the holograms of each block are calculated. Using a digital micromirror device (DMD), the holograms were projected at high speed to obtain the entire reconstructed image. However, the holograms on the DMD need to be binarized, thereby causing uneven brightness between the divided blocks. We correct this by controlling the displaying time of each hologram. Additionally, combining both the proposed and noise reduction methods, the image quality of the reconstructed image was improved. Results from the simulation and optical reconstructions show we obtained a full-color reconstruction image with reduced noise and uneven brightness.

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69.1: Scanning Evaporation System with Multi Evaporation Sources for Manufacturing Large Size Full-Color OLED Displays

SID Symposium Digest of Technical Papers ◽

10.1889/1.2036389 ◽

2005 ◽

Vol 36 (1) ◽

pp. 1890 ◽

Cited By ~ 1

Author(s):

Masakazu Murakami ◽

Hiroki Ohara ◽

Takahiro Ibe ◽

Hisao Ikeda ◽

Yoshiharu Hirakata ◽

...

Keyword(s):

Full Color ◽

Large Size

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Time-division Color Holographic Projection in Large Size Using a Digital Micromirror Device

10.20944/preprints202106.0438.v1 ◽

2021 ◽

Author(s):

Takayuki Takahashi ◽

Tomoyoshi Shimobaba ◽

Takashi Kakue ◽

Tomoyoshi Ito

Keyword(s):

Image Quality ◽

High Speed ◽

Reconstructed Image ◽

Digital Micromirror Device ◽

Full Color ◽

Large Size ◽

Reconstruction Image ◽

Reduction Methods ◽

Time Division

Holographic projection is a simple projection because it enlarges or reduces reconstructed images without using a zoom lens. However, one major problem associated with this projection is the deterioration of image quality as the reconstructed image enlarges. In this paper, we propose a time-division holographic projection, in which the original image is divided into blocks and the holograms of each block are calculated. Using a digital micromirror device (DMD), the holograms were projected at high speed to obtain the entire reconstructed image. However, the holograms on the DMD need to be binarized, thereby causing uneven brightness between the divided blocks. We correct this by controlling the displaying time of each hologram. Additionally, combining both the proposed and noise reduction methods, the image quality of the reconstructed image was improved. Results from the simulation and optical reconstructions show we obtained a full-color reconstruction image with reduced noise and uneven brightness.

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Realization of Rapid Large-Size 3D Printing Based on Full-Color Powder-Based 3DP Technique

Molecules ◽

10.3390/molecules25092037 ◽

2020 ◽

Vol 25 (9) ◽

pp. 2037

Author(s):

Guangxue Chen ◽

Xiaochun Wang ◽

Haozhi Chen ◽

Chen Chen

Keyword(s):

3D Printing ◽

Quantitative Relationship ◽

Chromatic Aberration ◽

Mechanical Tests ◽

Full Color ◽

Optimum Parameters ◽

Large Size ◽

Rotation Method ◽

3D Printed ◽

Printing Time

The powder-based 3DP (3D printing) technique has developed rapidly in creative and customized industries on account of it’s uniqueness, such as low energy consumption, cheap consumables, and non-existent exhaust emissions. Moreover, it could actualize full-color 3D printing. However, the printing time and size are both in need of upgrade using ready printers, especially for large-size 3D printing objects. Given the above issues, the effects of height and monolayer area on printing time were explored and the quantitative relationship was given in this paper conducted on the specimens with a certain gradient. On this basis, an XYX rotation method was proposed to minimize the printing time. The mechanical tests were conducted with three impregnation types as well as seven printing angles and combined with the characterization of surface structure based on the scanning electron microscope (SEM) digital images to explore the optimum parameters of cutting-bonding frame (CBF) applied to powder-based 3D printing. Then, four adhesives were compared in terms of the width of bonded gap and chromatic aberration. The results revealed that ColorBond impregnated specimens showed excellent mechanical properties which reached maximum when printed at 45° to Z axis, and α-cyanoacrylate is the most suitable adhesive to bond full-color powder-based models. Finally, an operation technological process was summarized to realize the rapid manufacturing of large-size full-color 3D printed objects.

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33.2: Large Size full-color eReader Displays Based on Electrowetting

SID Symposium Digest of Technical Papers ◽

10.1889/1.3500499 ◽

2010 ◽

Vol 41 (1) ◽

pp. 480 ◽

Cited By ~ 4

Author(s):

Johan Feenstra ◽

Ivar Schram ◽

Mick Evans ◽

Paul Vermeulen ◽

Chiara Cometti ◽

...

Keyword(s):

Full Color ◽

Large Size

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36.4: 3.4-inch Full-Color QHD AMOLED Display using Large-Size Flexible Substrate with Highly Reliable OS-FETs

SID Symposium Digest of Technical Papers ◽

10.1889/1.3621366 ◽

2011 ◽

Vol 42 (1) ◽

pp. 498-500 ◽

Cited By ~ 21

Author(s):

Kaoru Hatano ◽

Akihiro Chida ◽

Tatsuya Okano ◽

Nozomu Sugisawa ◽

Takaaki Nagata ◽

...

Keyword(s):

Flexible Substrate ◽

Full Color ◽

Large Size

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Coherency loss in γ' precipitates in nickel-base superalloy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100075014 ◽

1983 ◽

Vol 41 ◽

pp. 244-245

Author(s):

R. A. Ricks ◽

Angus J. Porter

Keyword(s):

Lattice Mismatch ◽

Lattice Parameter ◽

Nickel Base Superalloy ◽

Large Size ◽

The Matrix ◽

Nimonic 80A ◽

Interfacial Dislocations ◽

Nickel Base ◽

Coherency Loss ◽

Nimonic 115

During a recent investigation concerning the growth of γ' precipitates in nickel-base superalloys it was observed that the sign of the lattice mismatch between the coherent particles and the matrix (γ) was important in determining the ease with which matrix dislocations could be incorporated into the interface to relieve coherency strains. Thus alloys with a negative misfit (ie. the γ' lattice parameter was smaller than the matrix) could lose coherency easily and γ/γ' interfaces would exhibit regularly spaced networks of dislocations, as shown in figure 1 for the case of Nimonic 115 (misfit = -0.15%). In contrast, γ' particles in alloys with a positive misfit could grow to a large size and not show any such dislocation arrangements in the interface, thus indicating that coherency had not been lost. Figure 2 depicts a large γ' precipitate in Nimonic 80A (misfit = +0.32%) showing few interfacial dislocations.

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