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A Novel Approach to Power Optimization for Projection Systems


  • C-DOT, EC, Bangalore – 560100, Karnataka, India
  • C-DOT, Mehrauli, New Delhi –110030, India


Objectives: To use ambient light and distance as parameters to optimize power consumption of a projector system without deteriorating visual experience. Methods/Statistical Analysis: In this work, an efficient approach to optimize power consumption of a projector module is proposed using a light sensor and a distance sensor. Depending on the ambient light condition and distance between projector module and screen, backlight of the projector is adjusted, which affects the power consumed by the module. We have taken different ambient light condition ranging from LUX value of 1 to LUX value of approximately 150, as other conditions are not of practical use. Findings: The experience of a viewer depends on surrounding environment specifically ambient light. As the value of ambient light increases, to have a better visibility backlight of the display system/projector need to be increased and vice versa is also true. Again distance between the screen and source/projector also plays an important role in determining output visibility at a given power consumption. Both of these parameters are combined and used in this work to have an adaptive projector system. Experimental results show that around 30% powers saving can be achieved by implementing our proposed power optimization technique without compromising on the quality of the output. Application/Improvements: The outcomes of the work discussed in this paper can be used in most of the display system. The proposed method has taken care of both ambient light and distance between the screen and source by taking care on light that falls on per square unit area.


Ambient Light, DLP Technology, LED PWM, LUX, Power Optimization

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