Next Generation PVB Interlayer for Improved HUD Image Clarity

Spangler, Lora L.; Hurlbut, Jeffrey; Cashen, Daniel; Robb, Emily; Eckhart, Jim

doi:10.4271/2016-01-1402

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“…To overcome this problem, manufacturers are starting to produce windshields with a wedge angle that varies as a function of the vertical position on the windshield. 4,5 It is therefore important to develop methods for determining the wedge angle and variations in the thickness of the windshield.…”

mentioning

confidence: 99%

Simultaneous head-up display windshield wedge-angle and layer-thickness measurements

Marcus¹

2016

SPIE Newsroom

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mentioning

confidence: 99%

Simultaneous head-up display windshield wedge-angle and layer-thickness measurements

Marcus¹

2016

SPIE Newsroom

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Maximal Acceptable Ghost Images for Designing a Legible Windshield-Type Vehicle Head-Up Display

et al. 2017

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Compact dual-focal augmented reality head-up display using a single picture generation unit with polarization multiplexing

Liu,

Dong,

Qiu

et al. 2023

Opt. Express

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The augmented reality head-up display (AR-HUD) attracts increasing attention. It features multiple focal planes to display basic and AR information, as well as a wider field of view (FOV). Using two picture generation units (PGUs) to create dual-focal AR-HUDs leads to expanded size, increased cost, and reduced reliability. Thus, we previously proposed an improved solution by dividing one PGU into two partitions that were separately imaged into two virtual images with an optical relay system. However, the resolution of the PGU was halved for either virtual image. Regarding the drawbacks, this paper proposes a dual-focal AR-HUD using one PGU and one freeform mirror. Either virtual image utilizes the full resolution of the PGU through polarization-multiplexing. By performing optical design optimization, high image quality, except for the distortion, is achieved in an eyebox of 130 by 60 mm for far (10 m, 13° by 4°) and near (2.5 m, 10° by 1°) images. Next, we propose a distortion correction method by directly inputting the distorted but clear images acquired in the design stage into the real HUD with an inversed optical path. The proposed optical architecture enables a compact system volume of 9.5 L, close to traditional single-focal HUDs. Finally, we build an AR-HUD prototype, where a polarizing reflective film and a twisted nematic liquid crystal cell achieve polarization-multiplexing. The expected image quality of the two virtual images is experimentally verified.

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Next Generation PVB Interlayer for Improved HUD Image Clarity

Cited by 5 publications

References 0 publications

Simultaneous head-up display windshield wedge-angle and layer-thickness measurements

Simultaneous head-up display windshield wedge-angle and layer-thickness measurements

Maximal Acceptable Ghost Images for Designing a Legible Windshield-Type Vehicle Head-Up Display

Compact dual-focal augmented reality head-up display using a single picture generation unit with polarization multiplexing

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