P‐81: Twisted Nematic Reflective Display with Internal Wire Grid Polarizer

Sergan, T.; Kelly, Jack; Lavrentovich, M.; Gardner, Eric; Hansen, David R.; Perkins, Raymond T.; Hansen, J.; Critchfield, R.

doi:10.1889/1.1830846

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…Hence the existence of this minimum proves that the form birefringence model is not a good one for a WGP. 11,12 We performed a modeling calculation of the WGP by using rigorous diffraction theory. The modeling results can fit our experimental results well.…”

Section: Resultsmentioning

confidence: 99%

“…The wire grid thus behaves as a dielectric, and the incident wave is therefore totally transmitted. 8 There have been many theoretical explanations of the WGP, including the effective media theory, 9,10 the form birefringence theory, 11,12 and the rigorous diffraction theory. 13 In a separate paper we provide a full theoretical analysis of the optical WGP and compare the theoretical predictions with experimental results.…”

Section: Introductionmentioning

confidence: 99%

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Application of wire-grid polarizers to projection displays

Kwok

2003

Appl. Opt.

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We have measured the optical properties of wire-grid polarizers (WGPs). The implications of these results to the application of WGPs in projectors that use reflective light valves are discussed. In particular, the brightness and the contrast ratio of the projection system are investigated as functions of the angle of incidence of the light beam onto the WGP. It was found that the optimal incident angle is dependent on the physical design of the wire grids. In the sample that we describe, the optimal incident angle was 35 degrees instead of 45 degrees. At the optimal incident angle, both the transmission and the reflection extinction ratios can be quite good. However, WGPs suffer from the drawback of free-carrier absorption by the metal grid.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of wire-grid polarizers to projection displays

Kwok

2003

Appl. Opt.

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“…The effective medium theory for a WGP has been successfully used to account for some experimental results. 8 However, numerous studies have also revealed differences and similarities between the rigorous coupled wave analysis and the effective medium theory. 9,10 The difference between wire-gird polarizers vs. Polaroid iodized polarizers (O-type transmissive polarizer) or Optiva polarizers (E-type transmissive polarizer) comes from the fact that a wire-grid polarizer has a finite pitch, while a sheet polarizer has no intrinsic periodicity.…”

Section: Lcos Panel Contrast Based On Wire-grid Pbsmentioning

confidence: 99%

General methodology for LCoS panel compensation

Chen¹,

Robinson²,

Sharp³

2004

J Soc Info Display

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A general three-step methodology is presented to optimize contrast when compensating LCoS panels. The first step acts to compensate the in-plane residual retardation, while the second one improves the field of view (FOV) using either MacNeille-type or wire-grid polarizing beamsplitters (PBS). The orientation of the LCoS panel and compensator, relative to the MacNeille PBS, are very critical to achieve good system contrast. The final step is to account for reflections from anisotropic material, which appear as on-state light, limiting contrast.

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“…They have many advantages, including high heat and high light flux tolerance. They have also been used as reflective polarizers for polarization recycling [4][5][6] however, the 0.4-0.6 fill-factor polarizers that are optimized for high contrast are inefficient when used for LCD backlighting as a means of polarization recycling. In this paper, low fill-factor wire grid polarizers are investigated and found to be more suitable for polarization recycling in an LCD backlight.…”

Section: Introductionmentioning

confidence: 99%