Abstract

Laser based displays have gathered much attention, and they are expected to make an alternative huge market for visible laser diodes (LDs), because only the displays may have a wide color gamut which can express ITU-R BT.2020. Single panel spatial light modulator (SLM) type projectors using broad area (BA) LDs for light sources are most popular so far, and multi-panel ones have started to spread especially for high luminosity. The laser light source for the projector consists of red, green and blue color LDs or blue LD + yellow phosphor (+ red LD). Common requests for the LDs are highly-reliable high-power operation at high case temperature.

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