14.5L: <i>Late‐News Paper</i>: A High Efficiency Mobile Projection Engine Utilizing Color Sequential Illumination

Phillips, Bill; Grace, Jennifer; Zhisheng, Yun; Willett, Stephen; Snively, David; Pol, Tom van der; Ardashnikov, Boris; O'Shea, G; Moskovich, Jacob; Kreitzer, Melvyn H.

doi:10.1889/1.3256700

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…Typical LED pico-projectors have a throw ratio (image diagonal: distance to the screen) from about 1:1 to 0.5:1. 28 Because laser light has a higher fnumber, it will be possible to make very short throw optical engines 29,30 with throw ratios on the order of 5:1 and with 100% offset (relative to the projected plane). This means that an engine only ~3 in.…”

Section: How Lasers Will Change End Productsmentioning

confidence: 99%

Laser + LCOS projection‐technology revolution

Guttag¹,

Hurley²

2012

J Soc Info Display

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The advent of affordable direct-diode lasers changes all the rules for optical designs and the associated technologies that generate the images from laser light. These new lasers are forseen as driving fundamental changes in the size, power consumption, cost, resolution, and even the uses for pico-projectors. This paper discusses these topics from the perspective of laser-light-illuminated LCOS microdisplays.

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Section: How Lasers Will Change End Productsmentioning

confidence: 99%

Laser + LCOS projection‐technology revolution

Guttag¹,

Hurley²

2012

J Soc Info Display

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“…Lasers can be used to illuminate the same type of light valves that are also employed with lamps or LEDs: LCDs, DMD displays, or LCoS displays. 2 Besides, lasers also enable the realization of new types of projection displays. Among them are flying-spot and grating light-valve projection (GLV) systems, where the laser beam is scanned over the projection screen and the information is written pixel by pixel (flying-spot) 3 or line by line as in the case of GLV systems.…”

Section: Projection Requirementsmentioning

confidence: 99%

Solid‐state lasers for projection

et al. 2010

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Abstract— The unique advantage of projection displays is the ability to produce large images from small devices. The use of lasers as the projection light source will mean a further step in terms of compactness as well as efficiency for projection systems. However, the advent of laser projection is currently still limited by the availability of low‐cost green lasers. Blue‐diode‐pumped solid‐state lasers are one promising way to realize green as well as red lasers that are specifically suited for projection applications. An efficient solid‐state laser that is based on Pr3+:YLF as the laser material, pumped by a blue‐laser diode and emitting at 523 nm, is presented here. The laser reaches power‐conversion efficiencies of more than 7% and output powers of up to 378 mW at green wavelengths. By making only minor modifications to the laser resonator, a red laser emitting at 640 nm can be realized within the same setup. An output power of 166 mW at a power‐conversion efficiency of 6.9% is demonstrated in the red. By combining a red‐ and a green‐emitting blue‐diode‐pumped solid‐state laser with another blue diode, an integrated RGB projection light source can be realized that is based on a single‐diode technology.

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“…Mobile devices are becoming an important part of our daily life. The emerging embedded, detachable or portable standalone projection optical modules [1][2] may greatly broaden the applications in not only entertainments but also business. With the improvement in high resolution spatial light modulators, LEDs with higher efficiency, and compact optics, this ongoing trend will provide a potential unique selling point for handheld electronic devices.…”

Section: Introductionmentioning

confidence: 99%

P‐185: A High Efficiency Compact Size Color‐Sequential LCOS Projection Engine with 100% NTSC

Tan¹,

Sun²,

Kwok³

2011

Symp Digest of Tech Papers

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A CS-LCOS based projection system with high efficiency and compact size is developed. The light collection system is optimized to obtain about 75% coupling efficiency from LED to LCOS surface. More than 10% of the throughput of the overall system is expected with considering the collection efficiency, color mixing, polarization, surface reflection, and efficiency of each component. Measurement results show around 30 lumen flux output at 8 watts power input including LED and LCOS driving request, which is accordance with the design evaluation. The size of the demo is around 65mm*50mm*17mm, with a total volume of 55CC. Almost 100% NTSC is achieved with the benefit of sequential color generated with RGB LED shining and fast LC response.

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14.5L: Late‐News Paper: A High Efficiency Mobile Projection Engine Utilizing Color Sequential Illumination

Cited by 5 publications

References 3 publications

Laser + LCOS projection‐technology revolution

Laser + LCOS projection‐technology revolution

Solid‐state lasers for projection

P‐185: A High Efficiency Compact Size Color‐Sequential LCOS Projection Engine with 100% NTSC

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