LEDs ♦ news digest
c-axis: the c-axis of the IGZO crystal is aligned in a perpendicular direction to the surface of the layer see Fig. 3(a), (b) The name of the structure, theC- Axis Aligned Crystal CAAC structure, comes from this relation.
products and services throughout China and demonstrate Cree’s commitment to accelerate broader market adoption of LED lighting.
The firm’s TEMPO services provide LED lighting manufacturers a comprehensive suite of evaluation services for LED luminaires – ensuring customers have information needed to design and market quality LED products.
The new technology centres will offer a range of TEMPO Services to meet the unique needs of lighting manufacturers in China, including the Cree TEMPO 21 and TEMPO Thermal Simulation Services.
A conventional amorphous IGZO TFT has had a problem of shift in electrical characteristics in the gate bias temperature (BT) stress tests, especially in the gate BT stress tests with light irradiation. Meanwhile, a CAAC-IGZO TFT is less influenced by (is resistant to) the gate BT stress tests with light irradiation and has high reliability (see Fig. 4(a), (b)), which means that the TFT can be stable with CAAC-IGZO.
Cree’s experience indicates that many of the common quality issues and failure modes seen in Solid State Lighting products are not detected by currently available standardised tests. TEMPO 21 examines critical aspects of quality that commonly go unchecked such as chemical compatibility, driver spikes, dimmer compatibility and electrolytic capacitor analysis.
“Cree delivers our customers end-to-end development support and the opening of our new technology centres in Shenzhen and Shanghai is further evidence of our commitment to their success,” says Tang Guoqing, senior advisor, Cree Hong Kong Limited.
China to benefit from Cree LED technology centres
The firm has unveiled new centres in Shenzhen and Shanghai to aid customers in luminaire design and evaluation services to help accelerate LED product development
Cree is opening two new technology centres in China, further expanding its TEMPO (Thermal, Electrical, Mechanical, Photometric, Optical) Services in these key markets.
The technology centres support demand for Cree
“TEMPO Services can give manufacturers competitive advantages by helping them avoid costly design mistakes and by providing access to a broad range of test environments that are, in many cases, cost-prohibitive for them to build and operate.”
Effective LED luminaire thermal design is essential to ensure reliability and optimum performance. TEMPO Thermal Simulation predicts the thermal behavior of LED-based fixtures, including junction temperature, heat sink temperature, temperature profile and airflow profile.
TEMPO SPOT gives customers access to complex, costly equipment to measure the photometric performance of luminaires and replacement lamps. Every TEMPO Service delivers an accurate, easy- to-understand TEMPO report that includes all testing results and relevant performance data.
July 2012
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