At the China International Semiconductor Lighting Exhibition and Forum (CHINA SSL2009), Professor Nakamura Shuji of the University of California, Santa Barbara published a report titled "The Status and Development of GaN-Based Light-Emitting Devices."
At present, the application of non-polar gallium nitride (Nonpolar GaN) on LEDs and LDs has attracted the attention of international industry. The UCSB research team led by Nakamura Shuji has been a global leader in the publication of non-polar GaN blue LEDs. The LED components developed by the team have low loss and long life, which can be applied not only to the next generation of Blu-ray storage, but also to the development of the green LD, which will be applied to the miniature mobile phone projector and laser TV in the future.
Professor Nakamura said in the report that a blue-violet semiconductor laser device using GaN crystals generally utilizes a polar surface called a c-plane in GaN crystals. The non-polar surface refers to a surface perpendicular to the normal direction of the polar surface. The use of a non-polar surface can reduce the piezoelectric field that causes a decrease in luminous efficiency compared to the use of a polar surface. Therefore, it is theoretically possible to improve luminous efficiency (description of a piezoelectric electric field). At the same time, it also has the characteristics of outputting polarized light. By the above advantages, a blue-violet semiconductor laser element using a GaN crystal non-polar surface can be developed, and pulse oscillation can be successfully completed.
Gaming Headphones is a headset suitable for playing games. For game users, a game headset with excellent performance can allow players to experience the immersive feeling in the game. For competitive game players, the game headset can also assist game players and enhance combat effectiveness.
In the case of headphone use, we found that game use would be a large part of the demand, especially the need to use a pure headset to get better listening effect when both music and games are in use.
Compared with music headphones, Wired Game Headphones pay more attention to sound field and positioning sense (for example, shooting and shootout games need positioning), and the amount and intensity of low frequency are aggravated, so as to meet the user's experience of game sound effects. Music headphones, in essence, pay more attention to sound quality. The effect in the right range is super good, with pure sound quality and penetrating sound.
Among the many headsets, Wireless Gaming Headphone have the advantage of sensitivity. The relatively closed listening environment is also more conducive to game players to feel the details of the sound and improve their judgment of the sound. Therefore, compared with traditional headsets, gaming headsets have more advantages in positioning ability, can better express the sense of direction of sound, and are more suitable for 3D games to express sound clearly. In addition, player-oriented game headsets are often enhanced with low-frequency volume sensing to facilitate the game's plot and make it easier for players to immerse themselves in the game.
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