Application of Digital Radiography to Aerospace-Craft

Abstract

In order to apply digital radiography to the spacecraft, an improvement of the resolution for the flat panel detector has been studied. A higher resolution has been obtained by the following methods: First, the resolution of the scintillator has been gained by improving the granular nature of crystal and cross talk. Secondly, the silicon wafer has been improved by suppressing the collection of the electric charge generated in portions other than the photodiode. The resolution of the improved flat panel detector using the X-ray test chart was found to be 8.7 Lp/mm as contrasted to 6.3 Lp/mm of the detector before improvement. The image quality level has been studied under different radiographic parameters (tube-voltage, distance between the focal spot and flat panel detector, accumulation time, etc.), and appropriate conditions have been examined for developing this detector. Examples of radiographic images are shown in comparison with the results of X-ray film.

78-4:Distinguished Paper: A 2.78-in 1058-ppi Ultra-High-Resolution Flexible OLED Display Using CAAC-IGZO FETs

“…The advantage of this separation technique is that the FET can be fabricated by a high-temperature process due to the high heat resistance of the inorganic separation layer. An additional advantage is that a dense passivation film with high planarity formed at high-temperature can be fabricated [19][20][21][22][23][24][25]. The separation technique using the inorganic separation layer is described in detail in Fig.…”

24‐3: An 8.34‐inch 1058‐ppi 8K x 4K Flexible OLED Display

“…Flexible organic light-emitting diode (OLED) displays have been suggested as devices that satisfy these requirements [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. We have fabricated a variety of flexible OLED displays [1][2][3][4][5][6][7][8][9][10][11][12], such as a side-roll display with curved edges [5], foldable displays [6][7], and a large seamless multidisplay [8], as well as OLED displays with high pixel density using glass substrates [19][20][21][22].…”

77‐4: A 2.78‐in 1058‐ppi Ultra‐High‐Resolution OLED Hybrid Display using Oxide Semiconductor/Oxide Conductor (OS/OC) Pixel (Transparent Pixel) achieving High Aperture Ratio

“…In addition, we reported a 1058-ppi 8.33-in 8k OLED display in 2015 [8]. Furthermore, we have been developing a flexible OLED display using our unique transfer technology [9] with an inorganic separation layer [10][11][12][13][14][15][16]. In particular, in SID2016, we reported a 1058-ppi 2.78-in flexible OLED display and proposed it as a display achieving high resolution, light weight, and a high-speed response that may be necessary for HMD displays [17].…”