Viewing-angle and viewing-resolution enhanced integral imaging based on time-multiplexed lens stitching

Yang, Le; Sang, Xinzhu; Yu, Xunbo; Yan, Binbin; Wang, Kuiru; Yu, Chongxiu

doi:10.1364/oe.27.015679

Cited by 40 publications

(9 citation statements)

References 19 publications

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“…Yang et al constructed a directional backlight using a light-emitting diode (LED) array and formed a COVZ with a time-division display. 17 Further, Liu et al formed 40 deg OVZs in three directions using multidirectional backlight units and displayed a 3D image with a wide viewing zone of 120 deg in the horizontal direction using a lenticular lens. 18 Because the aforementioned methods use projectors or LED arrays, the COVZ is static.…”

Section: D Display System That Forms Covzmentioning

confidence: 99%

Integral three-dimensional display system with wide viewing zone and depth range using time-division display and eye-tracking technology

et al. 2022

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We propose an integral three-dimensional (3D) display system with a wide viewing zone and depth range using a time-division display and eye-tracking technology. In the proposed system, the optical viewing zone (OVZ) is narrowed to a size that only covers an eye to increase the light ray density using a lens array with a long focal length. In addition, a system with low crosstalk with respect to the viewer's movement is constructed by forming a combined OVZ (COVZ) that covers both eyes through a time-division display. Further, an eye-tracking directional backlight is used to dynamically control the COVZ and realize a wide system viewing zone (SVZ). The luminance unevenness is reduced by partially overlapping two OVZs. The combination of OVZs formed a COVZ with an angle that is ∼1.6 times larger than that of the OVZ, and an SVZ of 81.4 deg and 47.6 deg for the horizontal and vertical directions, respectively, was achieved using the eye-tracking technology. The comparison results of the three types of display systems (i.e., the conventional system, our previously developed system, and our currently proposed system) confirmed that the depth range of the 3D images in the proposed system is wider than that of the other systems.

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Section: D Display System That Forms Covzmentioning

confidence: 99%

Integral three-dimensional display system with wide viewing zone and depth range using time-division display and eye-tracking technology

et al. 2022

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“…In this process, there are problems of lateral light leakage and color shift. With three groups directional backlights and a fast-switching LCD panel, a timemultiplexed light field display with a 120-degree wide viewing angle is demonstrated [44].…”

Section: Introductionmentioning

confidence: 99%

Highly Reflective Thin-Film Optimization for Full-Angle Micro-LEDs

Ho²,

Chen

2021

Nanoscale Res Lett

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Displays composed of micro-light-emitting diodes (micro-LEDs) are regarded as promising next-generation self-luminous screens and have advantages such as high contrast, high brightness, and high color purity. The luminescence of such a display is similar to that of a Lambertian light source. However, owing to reduction in the light source area, traditional secondary optical lenses are not suitable for adjusting the light field types of micro-LEDs and cause problems that limit the application areas. This study presents the primary optical designs of dielectric and metal films to form highly reflective thin-film coatings with low absorption on the light-emitting surfaces of micro-LEDs to optimize light distribution and achieve full-angle utilization. Based on experimental results with the prototype, that have kept low voltage variation rates, low optical losses characteristics, and obtain the full width at half maximum (FWHM) of the light distribution is enhanced to 165° and while the center intensity is reduced to 63% of the original value. Hence, a full-angle micro-LEDs with a highly reflective thin-film coating are realized in this work. Full-angle micro-LEDs offer advantages when applied to commercial advertising displays or plane light source modules that require wide viewing angles.

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“…In particular, it produces real concentrations of light to optically produce 3D images that are observed without decoupling the convergence and the accommodation, avoiding the detrimental effects of the convergence-accommodation conflict. Thus, there has been substantially increasing interest in researching and implementing effective technologies for the capture, processing, and display of 3D images 6 – 8 . It is also inferred that flexible integral imaging 3D displays could be achieved via the combination of flexible 2D display panel and flexible MLAs 9 – 11 .…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, curved displays are now quickly overtaking flat monitors among discerning users, due to a number of benefits unique to their design, including enhanced sense of immersion, wider field of view and reduced eyes strain 6 , 33 – 35 . The realization of curved integral imaging 3D display not only have great application potentials, but also provide referential values to flexible 3D displays when they are under deformation 36 , 37 .…”

Section: Introductionmentioning

confidence: 99%

Large-scale microlens arrays on flexible substrate with improved numerical aperture for curved integral imaging 3D display

Wang

Chen

Weng

et al. 2020

Sci Rep

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Curved integral imaging 3D display could provide enhanced 3D sense of immersion and wider viewing angle, and is gaining increasing interest among discerning users. In this work, large scale microlens arrays (MLAs) on flexible PMMA substrate were achieved based on screen printing method. Meanwhile, an inverted reflowing configuration as well as optimization of UV resin's viscosity and substrate's surface wettability were implemented to improved the numerical aperture (NA) of microlenses. The results showed that the NA values of MLAs could be increased effectively by adopting inverted reflowing manner with appropriate reflowing time. With decreasing the substrate's wettability, the NA values could be increased from 0.036 to 0.096, when the UV resin contact angles increased from 60.1° to 88.7°. For demonstration, the fabricated MLAs was combined to a curved 2D monitor to realize a 31-inch curved integral imaging 3D display system, exhibiting wider viewing angle than flat integral imaging 3D display system. Display technology will develop in the direction of more natural vision and more user-friendly. In the past two decades, considerable attention has been paid to extend the classical two-dimensional (2D) displays into their three-dimensional (3D) counterparts because of its stronger sense of reality 1-4. Another important research stream is flexible display, which has thin, lightweight and non-breakable characteristics. Displays with flexible form factors enable the fabrication of displays on curvilinear surfaces and allow their shapes to be transformed, providing potential applications to mobile, wearable and vehicle display. Therefore, flexible 3D displays become a major technological and application goal in the field of next-generation displays. Integral imaging is an autostereoscopic and multiscopic 3D display technology that uses double micro-lens arrays (MLAs) to capture and reproduce a light field of the target based on reversibility principle of light rays 5. It is regarded as a promising approach to realize the 3D display system due to its typical characteristics, such as glasses free, full parallax, quasi-continuous view points, eliminating visual fatigue and real 3D display. In particular, it produces real concentrations of light to optically produce 3D images that are observed without decoupling the convergence and the accommodation, avoiding the detrimental effects of the convergence-accommodation conflict. Thus, there has been substantially increasing interest in researching and implementing effective technologies for the capture, processing, and display of 3D images 6-8. It is also inferred that flexible integral imaging 3D displays could be achieved via the combination of flexible 2D display panel and flexible MLAs 9-11. MLAs have been widely used as key components in lots of optical systems 12-14 , such as integral imaging 15,16 , optical communications 17 , digital display 18 , detection 19 and far field imaging 20. In particular, MLAs with good converging performance, great uniformity of focusing...

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Viewing-angle and viewing-resolution enhanced integral imaging based on time-multiplexed lens stitching

Cited by 40 publications

References 19 publications

Integral three-dimensional display system with wide viewing zone and depth range using time-division display and eye-tracking technology

Integral three-dimensional display system with wide viewing zone and depth range using time-division display and eye-tracking technology

Highly Reflective Thin-Film Optimization for Full-Angle Micro-LEDs

Large-scale microlens arrays on flexible substrate with improved numerical aperture for curved integral imaging 3D display

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