Wafer-Level Light Emitting Diode (WL-LED) Chip Simplified Package for Very-High Power Solid-State Lighting (SSL) Source

2016 ◽  
Vol 37 (2) ◽  
pp. 197-200 ◽  
Author(s):  
Yibin Zhang ◽  
Jianwei Xu ◽  
Mingdi Ding ◽  
Desheng Zhao ◽  
Hongjuan Huang ◽  
...  
Keyword(s):  
Solid State ◽  
High Power ◽  
Light Emitting Diode ◽  
Solid State Lighting ◽  
Wafer Level ◽  
Light Emitting ◽  
Very High

Demonstration of wafer‐level light emitting diode with very high output power

2014 ◽  
Vol 50 (25) ◽  
pp. 1970-1972 ◽  
Author(s):  
Yibin Zhang ◽  
Fei Xu ◽  
Desheng Zhao ◽  
Hongjuan Huang ◽  
Wei Wang ◽  
...  
Keyword(s):  
Output Power ◽  
Light Emitting Diode ◽  
High Output Power ◽  
Wafer Level ◽  
Light Emitting ◽  
Very High ◽  
High Output

PENGARUH DIMENSI GEOMETRIK LAMPU LED TERHADAP PERSEPSI KECERAHAN

2013 ◽  
Vol 3 (2) ◽  
pp. 41
Author(s):  
Andrea Marisi ◽  
Revantino Revantino
Keyword(s):  
Solid State ◽  
Printed Circuit Board ◽  
Light Emitting Diode ◽  
Circuit Board ◽  
Solid State Lighting ◽  
Light Emitting ◽  
Printed Circuit ◽  
Surface Mounting

Perkembangan teknologi di bidang Solid State Lighting selama dekade terakhir membuat diversifikasi penggunaan Light Emitting Diode untuk pelayanan pencahayaan umum. Balai Besar Bahan dan Barang Teknik sejak tahun 2011 telah melakukan penelitian dan pengembangan lampu LED berbasis Surface Mounting Device (SMD) 5050. Pada perancangan Printed Circuit Board (PCB) untuk memasangkan LED-smd tersebut, dilakukan analisis dimensi geometrik yang optimal sehingga dapat memancarkan cahaya ke segala arah dan memberikan persepsi kecerahan yang lebih baik. Untuk perancangan PCB tersebut, dipilih 2 (dua) model berbentuk silinder dengan memperhatikan rasio antara tinggi dan diameter alas. Dari pendekatan sumber titik dan perhitungan eksitansi luminus, diperoleh bahwa model dengan rasio ≈ 1 menghasilkan persepsi lebih cerah terhadap visual manusia.Kata kunci : dimensi geometrik, pendekatan sumber titik, eksitansi luminus, persepsi kecerahan

Performance Analysis of Various Types of High Power Light Emitting Diodes

2018 ◽  
pp. 91-98 ◽  
Author(s):  
Kamalika Ghosh ◽  
Debashis Raul
Keyword(s):  
High Power ◽  
Light Emitting Diode ◽  
Life Time ◽  
Effect Of Temperature ◽  
Light Sources ◽  
Test Results ◽  
Light Emitting ◽  
Tropical Countries ◽  
Cause Of Failure ◽  
Very High

Solid state, energy efficient light emitting diode (LED) technology is coming up to replace the conventional gas discharge, etc. light sources. Although declared life of LED is very high but in tropical countries their life time appears very short. This phenomenon is becoming the most drawbacks for usage of LED. To search out the reason for the failure lead to undertake thorough study on the performance of LED specifically on the various environmental conditions. Experimentation was carried out with various types of commercially available high power LED. Failure in tropical countries may be due to effect of temperature. Test results have been noted at various major parts of LEDs, e.g. die, and sink area. Detail analysis of test results at various parts of LEDs in different conditions tends to have some idea about the cause of failure of the LEDs in tropical countries with high ambient temperature and less scope of heat generation by the light source.

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