Scanning laser beam displays

Niesten, Maarten; Sprague, R.; Miller, Josh

doi:10.1117/12.783330

Cited by 12 publications

(7 citation statements)

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“…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. 4 The flying-spot technology has the strictest requirements on the laser source: The beam quality needs to be close to diffraction limited with a M 2 parameter well below two and a high modulation frequency of the laser of several tens of MHz.…”

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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Section: Projection Requirementsmentioning

confidence: 99%

Solid‐state lasers for projection

et al. 2010

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“…So far, laser-based displays have attracted much attention as an alternative application for visible LDs. [1][2][3][4] By using visible LDs, a color gamut could be expanded to the International Telecommunication Union (ITU) recommendation of BT.2020. Other merits such as low power consumption, small and light equipment, and highly reliable operation may also be achieved.…”

Section: Introductionmentioning

confidence: 99%

High-power operation of AlGaInP red laser diode for display applications

Kuramoto

Nishida

Abe

et al. 2015

High-Power Diode Laser Technology and Applications XIII

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Substantial limitation of output power in AlGaInP based red broad area (BA) laser diode (LD) originates from an electron thermal overflow from an active layer to a p-cladding layer and fatal failure due to catastrophic optical mirror degradation during the LD operation. New red BA-LD was designed and fabricated. The LD chip had triple emitters in one chip with each stripe width of 60 um, and was assembled on 9.0 mm -TO package. The LD emitted exceeding 5.5 W at heat sink temperature of 25 °C and 3.8W at 45 °C under pulsed operation with frequency of 120Hz and duty of 30%, although the current product, which has a 40 um single emitter chip assembled on 5.6mm -TO, does 2.0 W at 25 °C. The lasing wavelength at 25 °C and 2.5W output was 638.6 nm. The preliminary aging test under the condition with the operation current of 3.56A, CW, auto-current-control mode (ACC), and the heat sink temperature of 20 °C (almost equal to the output of 3.5 W) indicated that the MTTF due to COMD was longer than 6,600 hours under CW, 22,000 hours under the pulse with duty of 30%.

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“…[1][2][3] Another interesting architecture being devel-oped is the laser-scanning platform with only one or two MEMS mirrors and lasers modulated in the MHz frequency range. 4 The promise of lasers as light sources for projectors has long been known. Laser sources can provide such considerable advantages such as the widest color gamut, stable spectral output constant over time, small étendue, and linear polarization (the last two properties considerably improve the optical efficiency of the projection engine) and achieve high resolution without losing efficiency and brightness.…”

Section: Introductionmentioning

confidence: 99%

“…1 and 2(a)]. The spatial near-Gaussian mode is established in the laser resonator with flat mirrors due to the presence of a thermal lens in Nd:YVO 4 . In most cases, 3% Nd doping is used to provide efficient absorption of the pump laser (808 nm) beam into the gain Nd:YVO 4 crystal.…”

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confidence: 99%

Green laser sources optimized for highly efficient microdisplay‐based field‐sequential mobile projectors

Shchegrov¹,

Khaydarov²,

Essaian³

et al. 2010

J Soc Info Display

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Abstract— A novel green laser source, based on a monolithic cavity microchip laser platform, has been developed. The laser is designed to be a part of a miniature and efficient RGB light source for microdisplay‐based mobile projector devices. The use of highly efficient, periodically poled MgO‐doped lithium niobate as the non‐linear frequency doubler allows for a significant increase in the overall efficiency of the green microchip laser. Specifically, a 50–150‐mW green output with a wall‐plug efficiency exceeding 10% in the temperature range of greater than 40°C has been demonstrated. A compact package for this laser source with a volume less than 0.33 cm3 is discussed and results of performance tests are presented.

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Scanning laser beam displays

Cited by 12 publications

References 0 publications

Solid‐state lasers for projection

Solid‐state lasers for projection

High-power operation of AlGaInP red laser diode for display applications

Green laser sources optimized for highly efficient microdisplay‐based field‐sequential mobile projectors

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