Design of Hologram for Brightness Enhancement in Color LCDs

Valliath, George; Coleman, Zane A.; Schindler, J. L.; Polak, Robert D.; Akins, R. B.; Jelley, K.W.

doi:10.1889/1.1833689

Cited by 10 publications

(4 citation statements)

References 1 publication

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“…Many image-enhanced components for reflective displays have been proposed and used. These components are generally divided into two categories: diffusive ͑bump reflector 7 and diffuser 6 ͒ and collective ͑MAMA-LCF, 9 microslant reflector, 11 and holographic film 12 ͒. The comparison of their respective performances among MAMA-LCF and other components is listed in Table 3.…”

Section: Discussion and Expectationmentioning

confidence: 99%

Applications of Multidirectional Asymmetrical Microlens-Array Light-Control Films on Reflective Liquid-Crystal Displays for Image Quality Enhancement

Huang

Shieh

2004

Appl. Opt.

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The multidirectional asymmetrical microlens-array light-control film (MAMA-LCF) is developed for enhancing the image brightness and contrast ratio of various reflective liquid-crystal displays. By use of index-matching material, the interface reflection is greatly reduced. Through optimized designs, the surface-scattering effect is also suppressed; thus the contrast ratio is much enhanced. From experimental results, the MAMA-LCF leads to a approximately 1.5 x gain in brightness over the MgO standard white and a 15:1 contrast ratio for the reflective color super-twist nematic liquid-crystal display, 2.8 x MgO and a 23:1 contrast ratio for the polymer-dispersed liquid-crystal, and 2.8 x MgO and a 13:1 contrast ratio for the cholesteric liquid-crystal display. Potential applications of this low-cost plastic thin film for reflective liquid-crystal displays are foreseeable.

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Section: Discussion and Expectationmentioning

confidence: 99%

Applications of Multidirectional Asymmetrical Microlens-Array Light-Control Films on Reflective Liquid-Crystal Displays for Image Quality Enhancement

Huang

Shieh

2004

Appl. Opt.

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“…A holographic front diffuser (HFD) has been developed that increases the brightness of reflective LCDs by more than three times compared to a standard reflector. 3 As shown in Figure 3, the front diffuser diffracts light from the color LCD into a specific view angle thus achieving gain, removing glare and increasing contrast. The angle of view of the holographic diffuser is adjusted to balance viewing range and brightness.…”

Section: Holographic Front Diffusermentioning

confidence: 99%

15.3: Invited Paper: Volume Holographic Components for Display Applications

Trout

Gambogi

Steijn

et al. 2000

Symp Digest of Tech Papers

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Volume holographic components are being used to enhance the performance of a variety of liquid crystal and projection display systems. Holographic components address the ever-present need within display systems for more efficient light management. With proper design, holographic components address this need with higher light throughput, reduced thickness and weight, reduced energy consumption, and additional opportunities for unique system functions. This paper describes design parameters and examples of improved devices by introducing the unique features of diffractive holographic components. These features include angular and spectral selectivity, high efficiency, and multiple optical functions designed into single components. Holographic reflectors, front diffusers, and compensations films have been developed and used in direct view liquid crystal displays. Holographic color filters and projection screens have also been developed based on this technology. For these applications the holographic component and system will be discussed. Finally, design considerations will be discussed that relate to the development of new display systems and components.

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“…A necessity for reducing the power consumption of the transmissive or transflective LCD module led to development of not only the reflective LCD but also the development of reflective displays such as electrophoretic displays (e-paper displays or EPDs), micro electro-mechanical systems (MEMS) and microelectro-optical-mechanical systems (MEOMS) that use the frontambient light instead of back light [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

32.4L: Late‐News Paper: Frontlighting Reflective Display and Enhancing Image using Optical Noise Filtering‐Multilayer LGP

Käläntar¹

2015

Symp Digest of Tech Papers

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The reflective displays, such as electronic papers, micro-electromechanical systems and micro-electro-optical-mechanical systems, reflective liquid-crystal displays have great advantages over the transmissive displays in terms of low power consumption, color gamut and high contrast under bright ambient illumination. However, the optical characteristics are deteriorated under dim environment. In general, a single prismatic light-guide plate (LGP) is employed in frontlight unit (FLU) to illuminate a reflective display, in spite adding optical noise to the display module. In this paper the optical characteristic of a FLU that employs functional integrated LGP, i.e. multilayer/stacked LGPs with luminance enhancing function is studied.

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Design of Hologram for Brightness Enhancement in Color LCDs

Cited by 10 publications

References 1 publication

Applications of Multidirectional Asymmetrical Microlens-Array Light-Control Films on Reflective Liquid-Crystal Displays for Image Quality Enhancement

Applications of Multidirectional Asymmetrical Microlens-Array Light-Control Films on Reflective Liquid-Crystal Displays for Image Quality Enhancement

15.3: Invited Paper: Volume Holographic Components for Display Applications

32.4L: Late‐News Paper: Frontlighting Reflective Display and Enhancing Image using Optical Noise Filtering‐Multilayer LGP

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