32.1: <i>Invited Paper:</i> A Display System with 2‐D/3‐D Compatibility

Hamagishi, Goro; Sakata, Masahiro; Masamune, Ken; Inoue, M.; Taima, Kenji; Oyamada, K.; Kishimoto, S.

doi:10.1889/1.1833913

Cited by 6 publications

(5 citation statements)

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“…Meanwhile, Samsung Inc. [18] and LG Inc. [19] have published a similar work with a switching LCD barrier inserted between the LCD and its backlight. Sanyo Inc. [20] used polymer-dispersed liquid crystal (PDLC) as a transparent/diffuse switchable film. With an applied electric field, the transparent mode makes the parallax barrier effective as a 3D mode; on the contrary, the diffuse mode disturbs the direction of light and makes the barrier ineffective as a 2D mode.…”

Section: Parallax Barriermentioning

confidence: 99%

Investigation of Autostereoscopic Displays Based on Various Display Technologies

2022

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The autostereoscopic display is a promising way towards three-dimensional-display technology since it allows humans to perceive stereoscopic images with naked eyes. However, it faces great challenges from low resolution, narrow viewing angle, ghost images, eye strain, and fatigue. Nowadays, the prevalent liquid crystal display (LCD), the organic light-emitting diode (OLED), and the emerging micro light-emitting diode (Micro-LED) offer more powerful tools to tackle these challenges. First, we comprehensively review various implementations of autostereoscopic displays. Second, based on LCD, OLED, and Micro-LED, their pros and cons for the implementation of autostereoscopic displays are compared. Lastly, several novel implementations of autostereoscopic displays with Micro-LED are proposed: a Micro-LED light-stripe backlight with an LCD, a high-resolution Micro-LED display with a micro-lens array or a high-speed scanning barrier/deflector, and a transparent floating display. This work could be a guidance for Micro-LED applications on autostereoscopic displays.

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Section: Parallax Barriermentioning

confidence: 99%

Investigation of Autostereoscopic Displays Based on Various Display Technologies

2022

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“…Stereoscopic 3D displays are highly demanded in the handheld, portable devices and television sets, especially those that can provide 2D and 3D. In recent years, the 2D/3D devices using a spatially multiplexed auto‐stereoscopic such as switching barriers or registered lenticular construction have been reported in order to respond to the market needs . On the other hand, a built‐in 2D/3D switching display is relatively thick in which layers' alignment at the pixel resolution of the display device is needed.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, the 2D/3D devices using a spatially multiplexed auto-stereoscopic such as switching barriers or registered lenticular construction have been reported in order to respond to the market needs. [1][2][3][4] On the other hand, a built-in 2D/3D switching display is relatively thick in which layers' alignment at the pixel resolution of the display device is needed. Furthermore, the image resolution of the lenticular lens method and the parallax barrier method is limited by the pitch of the lens or the barrier where the realization of the lens or the barrier with very fine pitch is a problematic work.…”

Section: Introductionmentioning

confidence: 99%

Switching directional BLUs for full-resolution auto-stereoscopic 3D/2D and 2D/3D LCDs

Käläntar¹

2017

Jnl Soc Info Display

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Directional backlight unit (BLU) design concept was applied to realize full‐resolution field alternate auto‐stereoscopic liquid crystal displays (LCDs) with built‐in 3D/2D and 2D/3D. The application‐oriented BLU design requires priority in realizing 2D mode or 3D mode. The switching characteristic of BLU with two confronting illuminating sets was applied to build 2D mode into 3D display and 3D mode into 2D display. An LCD with 2D mode as primary function requires higher double‐sided luminance uniformity than 3D mode. On the other hand, an LCD with 3D mode requires higher single‐sided luminance uniformity than 2D mode. For increasing the double‐sided luminance uniformity for 2D mode as a primary function of the display, the former BLU design was realized by using uniform prismatic structure, that is, using uniform bilateral prismatic structure with a cross section of isosceles triangle on the back surface of the light‐guide plate. For increasing single‐sided luminance uniformity for 3D mode as a primary function of the display, the latter was realized by using graded angle design, that is, unilateral prisms with a cross section of a scalene triangle on the back surface of the light‐guide plate. The LCDs of small‐sized‐handheld game devices and still cameras were fabricated using the 3D/2D and 2D/3D displays.

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“…The recent raise in worldwide awareness in three-dimensional (3D) stereoscopic display in the handheld, portable devices and television sets is creating huge demand for devices that can provide a 2D and 3D display in which 2D is the primary function of the display. In recent years the 2D/3D devices using a spatially multiplexed auto-stereoscopic such as switching barriers or registered lenticular construction have been reported [1][2][3][4]. However, the 2D/3D switching requires relatively thick display that needs aligned layers at the pixel resolution of the display device.…”

Section: Introductionmentioning

confidence: 99%

57.1: Directional BLU for Full Resolution Field Alternative Auto‐Stereoscopic 3D/2D and 2D/3D LCDs

Käläntar¹

2014

Symp Digest of Tech Papers

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Switching directional backlight units (BLUs) were designed and prototyped for full resolution field alternative autostereoscopic 3D liquid crystal displays (LCDs). The inherent switching characteristic of the backlight unit (BLU) in which two confronting illuminating light sources were mounted on the sides of a light-guide plate (LGP), was applied to build 2D into 3D and 3D into 2D in theLCDs.The design based on 2D concept required a uniform bilateral prismatic structure with a cross section of isosceles triangle on the back surface of the functional LGP. The structure of bilateral-prismatic LGP and two confronting illuminating sides led to an increase in double uniformity, i.e. for doubleside illuminations, and a decrease in single uniformity, i.e. for single side illumination (2D as primary function of the display; 2D/3D). However, a design that was based on 3D concept required angle gradation for the unilateral prisms on the back surface of the functional LGP that led to an increase in single uniformity and a decrease in double uniformity (3D as primary function of the display; 3D/2D). Both switching concepts were used to display 3D and 2D on LCDs of small size handheld game devices and still cameras. Author KeywordsField alternative LCD-BLU; 3D/2D LCD; 2D/3D LCD; bilateral louver prism; unilateral louver prism.

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32.1: Invited Paper: A Display System with 2‐D/3‐D Compatibility

Abstract: We improved the parallax barrier technology

Cited by 6 publications

References 0 publications

Investigation of Autostereoscopic Displays Based on Various Display Technologies

Investigation of Autostereoscopic Displays Based on Various Display Technologies

Switching directional BLUs for full-resolution auto-stereoscopic 3D/2D and 2D/3D LCDs

57.1: Directional BLU for Full Resolution Field Alternative Auto‐Stereoscopic 3D/2D and 2D/3D LCDs

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