Date
Place
- Room G (Room 306)
- 54. Large Area Displays I
- August 21, 2015 (Friday)
- 11:00 ~ 12:30
- [54-2]
- 11:25 ~ 11:50
- Title:[Invited] Recent Progress of Red Laser Diodes for Display Applications
- Tetsuya?Yagi (Mitsubishi Electric Corp., Japan)
Abstract: Laser based displays have gathered much attention, and they are expected to make an alternative huge market to optical disks for visible laser diodes (LDs), because the displays may have a wide color gamut which can express ITU-R BT.2020, low power consumption, and so on.? A red (638 nm) LD shows worst characteristic dependence on temperature in visible LDs for display applications because of small energy difference in conduction band (DEc).? DEc is determined by semiconductor crystal itself and is hard to modify.? In this sense, the red LD may be the weakest link of visible laser light source chain.? In red LDs what we could do to improve the characteristics is to re-design the geometry of the LD chip and the package in order to reduce the thermal resistance.? We took a new design concept, triple emitter in one chip and f9.0-TO can package, into the red LD to improve its characteristics.? These were effective to reduce the thermal resistance of LD, and the LD emitted 5.50W and 3.85 W at 25¡ÆC and 45¡ÆC respectively.? The values were approximately 2.7 times of our current product, and world recorded output power in TO base red LDs.
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