Full-color micro-LED display with high color stability using semipolar (20-21) InGaN LEDs and quantum-dot photoresist

Chen, Sung‐Wen Huang; Huang, Yu-Ming; Singh, Konthoujam James; Hsu, Yao Jane; Liou, Fang-Jyun; Song, Jie; Choi, Joowon; Lee, Po-Tsung; Lin, Chien-Chung; Zhong, Cheng; Han, Jung; Wu, Tingzhu; Kuo, Hao‐Chung

doi:10.1364/prj.388958

Cited by 141 publications

(79 citation statements)

References 43 publications

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“…Hence, using the bottom side black PR and the upper side gray PR which provided height wall, the cross-talk between Further, the leakage of the blue incident light and cross-talk remain challenging issues for the µLED application. In 2020, Huang Chen et al [49] combined the CdSe/CdZnS-based thick-shell QDs and black PR with TiO 2 , which can return the incident light to the QDPR and effectuate re-absorption in QDs. Black PR can absorb redundant incident blue light, as shown in Figure 5a.…”

Section: History Of Qd Patterning Techniquementioning

confidence: 99%

“…Hence the black matrix should prevent cross-talk effects because of its high contrast ratio. Additionally, the QDPR, which is a combination of QDs, photoresist, and TiO 2 [49]. TiO 2 can be considered a mirror to reflect incidents of blue light.…”

Section: History Of Qd Patterning Techniquementioning

confidence: 99%

“…( b ) EL image of RGB pixels. ( c ) Color gamut of RGB pixel assembly from c-plane μLED and QDPR at various current densities in CIE 1931 color space [ 49 ]. Figure reproduced with permission from Optical Society of America.…”

Section: Figurementioning

confidence: 99%

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Advances in Quantum-Dot-Based Displays

et al. 2020

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In terms of their use in displays, quantum dots (QDs) exhibit several advantages, including high illumination efficiency and color rendering, low-cost, and capacity for mass production. Furthermore, they are environmentally friendly. Excellent luminescence and charge transport properties of QDs led to their application in QD-based light-emitting diodes (LEDs), which have attracted considerable attention in display and solid-state lighting applications. In this review, we discuss the applications of QDs which are used on color conversion filter that exhibit high efficiency in white LEDs, full-color micro-LED devices, and liquid-type structure devices, among others. Furthermore, we discuss different QD printing processes and coating methods to achieve the full-color micro-LED. With the rise in popularity of wearable and see-through red, green, and blue (RGB) full-color displays, the flexible substrate is considered as a good potential candidate. The anisotropic conductive film method provides a small controllable linewidth of electrically conductive particles. Finally, we discuss the advanced application for flexible full-color and highly efficient QD micro-LEDs. The general conclusion of this study also involves the demand for a more straightforward QD deposition technique, whose breakthrough is expected.

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Section: History Of Qd Patterning Techniquementioning

confidence: 99%

Section: History Of Qd Patterning Techniquementioning

confidence: 99%

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Advances in Quantum-Dot-Based Displays

et al. 2020

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“…This method can not only control the thickness and size of the QD conversion layer but also retain the characteristics of photolithography technology, thereby providing a cost-effective solution for the development of high-resolution, large-area micro-LED displays [ 80 ]. In 2020, Chen et al prepared an RGB full-color micro-LED array using a photoresist color conversion layer mixed with QD [ 81 ]. The experiments show that QDs fused with photoresist can reach a quantum yield of 60–70%, and the optical density of red and green mixed QDs can reach 1.5 and 0.8, respectively.…”

Section: Color Conversion Technologymentioning

confidence: 99%

Full-Color Realization of Micro-LED Displays

et al. 2020

Nanomaterials

150

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Emerging technologies, such as smart wearable devices, augmented reality (AR)/virtual reality (VR) displays, and naked-eye 3D projection, have gradually entered our lives, accompanied by an urgent market demand for high-end display technologies. Ultra-high-resolution displays, flexible displays, and transparent displays are all important types of future display technology, and traditional display technology cannot meet the relevant requirements. Micro-light-emitting diodes (micro-LEDs), which have the advantages of a high contrast, a short response time, a wide color gamut, low power consumption, and a long life, are expected to replace traditional liquid-crystal displays (LCD) and organic light-emitting diodes (OLED) screens and become the leaders in the next generation of display technology. However, there are two major obstacles to moving micro-LEDs from the laboratory to the commercial market. One is improving the yield rate and reducing the cost of the mass transfer of micro-LEDs, and the other is realizing a full-color display using micro-LED chips. This review will outline the three main methods for applying current micro-LED full-color displays, red, green, and blue (RGB) three-color micro-LED transfer technology, color conversion technology, and single-chip multi-color growth technology, to summarize present-day micro-LED full-color display technologies and help guide the follow-up research.

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“…Realizing wide color gamut display has become the development direction of the new generation of display technology [25], [26]. Highly saturated colors coming from LEDs, LDs, quantum dots, and rare-earth phosphors with relatively narrower FWHMs are propitious for realizing wide color gamut display [27], [28].…”

Section: Optimization For Display Applicationmentioning

confidence: 99%

Investigation on Circadian Action and Color Quality in Laser-Based Illuminant for General Lighting and Display

et al. 2020

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In this work, the genetic algorithm is employed to optimize both circadian action factor (CAF) and color quality of laser-based illuminants (LBIs) with three, four, and five spectral bands to disclose its possible use in two common white lighting applications, i.e. bedroom lighting and office lighting. Comparing all LBIs at a correlated color temperature (CCT) of 3000 K and a color rendering index of 80, the CAF of four-band LBIs reaches a minimum of 0.238 and maintains at a possibly highest luminous efficacy of radiation (LER) of 422 lm/W among all cases. The performances of white LBIs are also compared with those of white light-emitting diodes (LEDs). The results demonstrate that, under the same conditions of color rendering and color temperature, both four-band LBIs and four-band LEDs exhibit the largest circadian tunability of about 4.7, while four-band LBIs possess much higher LER at the same time compared with four-band LEDs. In addition, for the display application, the investigation on the optimal circadian tunability as a function of color gamut at two CCTs (3000 K and 6500 K) is also performed. We believe that this study can serve as a useful guidance for the application of LBIs in both the healthy general lighting and display.

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Full-color micro-LED display with high color stability using semipolar (20-21) InGaN LEDs and quantum-dot photoresist

Cited by 141 publications

References 43 publications

Advances in Quantum-Dot-Based Displays

Advances in Quantum-Dot-Based Displays

Full-Color Realization of Micro-LED Displays

Investigation on Circadian Action and Color Quality in Laser-Based Illuminant for General Lighting and Display

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