T. N. Ruckmongathan

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A large number of gray shades can be displayed in rms responding displays by using integer wavelets. The technique is demonstrated by displaying 64 gray shades in a twisted nematic liquid crystal display. We have reduced the hardware complexity of the display drivers by adding a few analog multiplexers that are common to a large number of stages (one for(More)
A technique for displaying gray shades in root-mean-square responding displays is proposed. It is based on wavelets derived from a slant matrix of order 3. We have shown that the hardware complexity of display drivers and controller can be reduced to the same extent as that of the technique using the simple integer Haar wavelets. The number of time(More)
A line-by-line addressing technique that is based on wavelets is proposed to obtain gray shades in root-mean-square responding matrix displays. A large number of gray shades can be displayed with a smaller number of voltages (simple drivers) as compared with amplitude modulation and a smaller number of time intervals as compared with the frame modulation.(More)
Demand for high quality images in mobile phones has set a new standard for displays in such portable devices. Active matrix liquid crystal displays (LCDs) are replacing the passive matrix LCDs in these applications. One of the reasons is the lack of simple techniques for displaying a large number of gray shades. Our goal was to develop new addressing(More)
Quality of image in a display depends on the contrast, colour, resolution and the number of gray shades. A large number of gray shades is necessary to display images without any contour lines. These contours are due to limited number of gray shades in the display causing abrupt changes in grayness of the image, while the original image has a gradual change(More)
Amachavadi R. Shashidhara Temkar N. Ruckmongathan Abstract — The design and implementation of a wavelet-based addressing technique capable of displaying gray shades is presented. The hardware complexity of the display drivers has been reduced by adding a few analog multiplexers that are common to the drivers. The controller was implemented by using a(More)