發光二極體色溫控制技術及其於色序式微型投影機之應用

邱嘉豪

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發光二極體色溫控制技術及其於色序式微型投影機之應用

Color-Temperature Modulation of RGB LEDs and It’s Application of Color-Sequential Pico-Projectors

邱嘉豪 , Masters　　Advisor：孫文信;伍茂仁　　

繁體中文

色序式微型投影機；色溫控制技術；發光二極體； white balance ； pico-projector ； CIE 1931 ； lumens ； power consumption ； RGB LED

Abstract │ Reference (30) │ Altmetrics

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In this thesis, the modulations on LEDs driving current and duration ratio of RGB-LED-array as light source for pico-projector display were proposed. The light source that we use in this study is OSRAM LE ATB S2W. 
We perform our light source in consideration of three orientations, power consumption, brightness, and color temperature. Two designs for different projection types, low power-consumption and high brightness, are proposed. Both types are designed to achieve color temperature of 6500K. For a low-power-consumption type, the light source is able to supply 47 lm with color temperature of 6530K at only 0.85-watt power consumption. For high-brightness type, 78.08 lm flux output with color temperature of 6700K is achieved at 2.53 W. Only 5 % difference in brightness and 3 % difference in color temperature between design and measurement.
Furthermore, we program a computation tool to simplify computations of prominent appropriate RGB duration ratio from inputting different objective color temperature and driving current of each LED. It also shows brightness and color space results.

Reference ( 30 ) 〈TOP〉

[4] G. Harbers, “High Performance LCD Backlighting using High Intensity Red, Green and Blue Lighting Emitting Diodes,” SID Symposium Digest of Technical Papers 32, 702-705 (2001).
連結：
[6] S. Muthu, F. Schuurmans, and M. Pashley, “Red, Green and Blue LED for White Light Illumination,” IEEE journal on Selected Topics in Quantum Electronics 8, 333-338 (2002)
連結：
[7] Harald Ries,” Mixing colored LED sources” Proc. of SPIE Vol. 5186 ,2003, p 27-32
連結：
[8] Harald Ries, Inex Leike, “Optimized Additive Mixing of Colored LED Sources,” Optical Engineering, Vol.43, NO.7, 1531- 1536 (2004).
連結：
[9] Shoji Tominaga,” A color control method for image output with projection displays” Proc. SPIE 6058, 60580I (2006).
連結：

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