Journals Proceedings

Abstract

Solid State Lighting (SSL) becomes one of the most important products due to their energy efficiency compared to conventional type lighting. Electroluminescence (EL) whether organic EL (also known as OLED) or inorganic EL are becoming increasingly important technology because of their potential applications for display and domestic lighting. Inorganic EL lamp is a capacitor-based electronic device technically known as Light Emitting Capacitor (LEC), while currently well-known LED lamp is a diode-based, where both of them have their own advantages. The advantages of SSL compared to conventional gas discharge lighting are they are very low power consumption, safe (non-toxic material used) and flexible design. The research is focused on development of LEC for domestic lighting purpose, and as an alternative for energy saving solid state lighting. One of its advantage is it can be generated using bi-directional current path such as from AC supply while LED and OLED only have one or unidirectional current path. The characteristics LEC, based on the type phosphor and lamp dimension in terms of electrical and optical properties were studied. Electrical properties is dealing with the measurement and calculation of current, voltage and power consumption whereas optical properties is dealing with the measurement and observation of emission spectra, brightness and color output. From the results, the intensity of emitted light (brightness of the EL lamp) depends on the driving parameters (voltage), which regulate all other operating characteristics. The electrical and optical properties also strongly influenced by the size (lamp dimension), type of phosphor (red, green, blue) and the thickness of the phosphor layer.