&lt;title&gt;High-resolution LCD-projection-based color head-up display&lt;/title&gt;

Brown, Robert D.; Greer, Michael R.

doi:10.1117/12.439134

Cited by 4 publications

(5 citation statements)

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“…The intermediate image is formed between the relay system and combiner, which is positioned in sight of the pilot in such a way-by reflection from the combiner-that a virtual image forms in the far field. Through the combiner, a pilot can simultaneously observe the outside scene, such as a runway, as well as information gathered from various types of sensors [8,[16][17][18].…”

Section: A Basic Principle Of Hudmentioning

confidence: 99%

“…An advanced HUD requires higher brightness, resolution, and diffraction efficiency, as well as a larger FOV and better stability. Industry standards require that the HUD's contrast ratio shall be greater than 1.2, which obeys the following equation [8,12]:…”

Section: Hhud Performance Requirementsmentioning

confidence: 99%

“…(2), L D must be larger than 5480 cd∕m 2 . Avionics displays require a broad range of dimming control in order to adapt to different working environments [8]. In traditional HUDs, the resolution will be reduced and the CRT phosphor will degrade if the CRT is used at high luminance, thus reducing the CRT's lifetime.…”

Section: Hhud Performance Requirementsmentioning

confidence: 99%

“…While the cathode ray tube (CRT) performs well in traditional HUD systems, its limitations in size, weight, resolution, luminance, and reliability are fatal [7]. With the development of digital technology, several digital image sources, such as liquid-crystal displays (LCDs), liquid crystal on silicon, and digital micromirror devices, have replaced CRTs [8][9][10][11][12]. The holographic technology used in HUDs would effectively increase diffraction efficiency because of its wavelength and angle selectivity.…”

Section: Introductionmentioning

confidence: 99%

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Design and fabrication of a holographic head-up display with asymmetric field of view

et al. 2014

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It is difficult to design and fabricate a head-up display (HUD) with a large asymmetric field of view (FOV) while maintaining a good image quality. In this paper, we design and develop such a holographic HUD system. To improve luminance and enhance the environmental adaptability of the HUD, we use a liquid crystal display with high brightness as well as a holographic reflection element. The vertical FOV is tilted to an angle of -7°, which is consistent with the actual view of the pilot. The decentration and tilt of the optical relay system effectively compensate for the distortion and off-axis aberration due to the asymmetric FOV and tilted, curved combiner. The transition plates used in the mechanical structure significantly decrease the difficulty in fabrication and alignment, and virtual prototyping greatly reduces the risk and shortens the development cycle. Experimental results demonstrate that this prototype achieves a total FOV of 30° (horizontal) ×24° (vertical), a resolution of 1280×1024, and a 5% distortion.

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Section: A Basic Principle Of Hudmentioning

confidence: 99%

Section: Hhud Performance Requirementsmentioning

confidence: 99%

Section: Hhud Performance Requirementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and fabrication of a holographic head-up display with asymmetric field of view

et al. 2014

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“…e development of head-up displays, therefore, could solve such inconvenience for drivers and ensure the safety on streets. In regard to the development of automobile displays, displays have evolved from traditional CRT to liquid-crystal displays (LCDs) [3], liquid crystal on silicon (LCoS), and digital micromirror devices (DMD) because of the advance of digital technology. e advance of MEMS process in past years further allows the application of laser-based pico projectors [4].…”

Section: Introductionmentioning

confidence: 99%

An Augmented Reality Head-Up Display System with a Wide-View Eyebox

Chuang

Chen

et al. 2020

International Journal of Optics

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This study proposes to apply the combination of two 90-degree prisms and a holographic optical element to an image-dividing element, divide an image into three through the virtual image projection system, and accurately project the images to 160 cm behind the windshield. In order to distinguish the left image, middle image, and right image at the horizontal direction, the 90-degree prism is first utilized for horizontally deflecting the light, a holographic optical element is then used for presenting the vertical deflection of the image, and finally, the images are horizontally arranged as a real image on the diffuser. An image-dividing element is eventually integrated to the virtual image projection system. Then, the divided images are made as a virtual image which is projected to 160 cm behind the windshield to combine with the street scene. The horizontal angle of view of an eyebox is increased from 2.51° to 7.22°, and the size of the eyebox is 31.68 cm × 12.48 cm, allowing a wide-view laser-based head-up display with the large-angle beam-splitting function being successfully designed. It would not affect the field of view on the road, and this system could reduce the space and be arranged easily in a vehicle. Therefore, this proposed system is suitable for the aftermarket.

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Optical design and tolerance of a high efficiency laser polarization grating-polarization conversion system based and diffraction limited heads up display projector

Fard¹,

Farhadian²,

Abbasabadi³

2020

Laser Phys.

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In this paper, a compact and diffraction limited heads up display (HUD) image source is presented. The great benefit of this design is its diffraction limited optic, compacted structure, economic considerations, simplicity in manufacturing and high efficiency image quality. The innovation of this design is the use of a polarization grating-polarization conversion system (PG-PCS). This module transforms the unpolarized Gaussian beam to a linearly polarized beam and it simultaneously homogenizes the spatial intensity profile. With this module, it is possible to increase the efficiency of illumination and to utilize the ordinary micro LCD instead of using a digital micro mirror device (DMD) and liquid crystal on silicon (LCOS) micro displays. The diameter of the image plane is 76.2 mm (in accordance with conventional types). Our design yielded uniform illuminated image and its high efficiency facilitates display readability in see-through HUDs operating in high ambient light as well as low ambient light.

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<title>High-resolution LCD-projection-based color head-up display</title>

Cited by 4 publications

References 0 publications

Design and fabrication of a holographic head-up display with asymmetric field of view

Design and fabrication of a holographic head-up display with asymmetric field of view

An Augmented Reality Head-Up Display System with a Wide-View Eyebox

Optical design and tolerance of a high efficiency laser polarization grating-polarization conversion system based and diffraction limited heads up display projector

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