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We developed a single-panel LCD microdisplay system using a field-sequential color (FSC) driving method and an organic light-emitting diode (OLED) as a backlight unit (BLU). The 0.76′′ OLED BLU with red, green, and blue (RGB) colors was fabricated by a conventional UV photolithography patterning process and by vacuum deposition of small molecule or...
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This work demonstrated color-conversion layers of red and green quantum dots color filter for full-color display arrays. Ligands exchange using (3-glycidyloxypropyl) trimethoxysilane with epoxy functional groups to treat QDs in the liquid phase was performed for photolithography use. The combination of ligands of QDs with photo-initiator played a p...
Citations
... [5][6][7] Compared with mature micro-displays, for example, liquid crystal display micro-displays, OLED-on-silicon micro-displays have additional characteristics of all solid-state and fast response time, which causes particular advantages in shock-resistant display filed and high-speed entertainment display field. [8][9][10][11][12] On account of the extremely small pixel size, making color filters (CFs) directly on thin-film encapsulated white OLEDs has become a viable solution for full-color high-resolution micro-displays. 13,14) Therefore, on the one hand, the encapsulation film of OLEDs has to meet the requirement on the water vapor transmission rate (WVTR) of 10 −6 g•m −2 •d −115) before the CFs photolithography process, 16) on the other hand, the fabrication temperature of the encapsulation thin film should below the glass transition temperature (∼100°C) of all the functional layer materials of OLEDs. ...
High-performance submicron thin-film encapsulation deposited rapidly under low temperature plays an important role in Si-based organic micro-displays. In this letter, the formation mechanism of high-performance encapsulation films consisting of SiO2/in-situ plasma oxidized Al at 77°C is explained. We think that the reason why the performance of encapsulation films deposited by this method behave better than the simple stacking of SiO2/Al2O3 is the formation of Al-O-Si bonds. By further optimizing the process parameters, the water vapor transmission rate and the transmittance in the visible region have been improved, which reached 10-6 g∙m 2∙day 1 and 90%, respectively.
... One OLED pixel in small size OLEDs is able to emit red (R), green (G), and blue (B) light from separate sub-pixels fabricated by the photolithographic process with a fine pat-How to cite this paper: Shi terned mask. Although the visibility of OLED is better than that of LCD due to much higher contrast [5] [6] [7], the further improvement of its visibility is still highly desirable, especially for the outdoor use of mobile and wearable OLED devices. One simple technique is to reduce the reflected ambient light by circular polarization, and an alternative way is to locate a light-absorbing black layer at the back of OLED [8]. ...
We demonstrate that layered spatial light modulators (SLMs), subject to fixed lateral displacements and refreshed at staggered intervals, can synthesize images with greater spatiotemporal resolution than that afforded by any single SLM used in their construction. Dubbed cascaded displays, such architectures enable superresolution flat panel displays (e.g., using thin stacks of liquid crystal displays (LCDs)) and digital projectors (e.g., relaying the image of one SLM onto another). We introduce a comprehensive optimization framework, leveraging non-negative matrix and tensor factorization, that decomposes target images and videos into multi-layered, time-multiplexed attenuation patterns---offering a flexible trade-off between apparent image brightness, spatial resolution, and refresh rate. Through this analysis, we develop a real-time dual-layer factorization method that quadruples spatial resolution and doubles refresh rate. Compared to prior superresolution displays, cascaded displays place fewer restrictions on the hardware, offering thin designs without moving parts or the necessity of temporal multiplexing. Furthermore, cascaded displays are the first use of multi-layer displays to increase apparent temporal resolution. We validate these concepts using two custom-built prototypes: a dual-layer LCD and a dual-modulation liquid crystal on silicon (LCoS) projector, with the former emphasizing head-mounted display (HMD) applications.
White organic light emitting diodes (WOLEDs) were fabricated using blue, green and red emitting layers (EMLs). The device has a structure of ITO/NPB/EML/Alq3/Liq/Al. Here, to control the white color balance, the location of the blue EML in the WOLEDs was fixed and only the
thickness of blue EML was changed while both thickness and position of the green and red EMLs were adjusted. When adjusting the thickness of blue EML, the occurrence area of recombination zone was changed to influence the green luminescence. When adjusting the location and thickness of red
EML, it could be found that the current density is more sensitive to the location of red EML than its thickness. Furthermore, it was discovered that light was emitted due to the Förster energy transfer even if it was apart from the recombination zone. WOLEDs with a maximum luminance of
17,740 cd/m,2 an external quantum efficiency of 2.12% at 100 cd/m,2 CIE coordinates of (0.328, 0.301) and a color temperature of 6,185 K were obtained.
We present investigations of light-scattering thermal cross-link package
film based on self-assembly for liquid crystal display using light
emitting diode. Thermal cross-link package films based on selfassembly
indicated good nano regularly-structured patterning for
light-scattering, excellent environmental stability of optical
parameters, and solvent intermixing resistance after thermal cross-link
reaction. The developed light-scattering thermal cross-link package
film-s based on self-assembly is one of the most promising processes
ready to be incorporated into the mass production of patterning
light-scattering optical layer for advanced liquid crystal display,
organic electroluminescent display, and solar cell devices.
