Abstract: Power consumption in liquid crystal displays is analyzed by including frequent polarity reversals and duty cycle control. A multi-step voltage profile is proposed to reduce the power consumption in multiplexed and non-multiplexed displays. The present invention relates to a method to optimize power consumption in Liquid Crystal Display, wherein said method comprises steps of applying multi-step waveform for selecting pre-determined address lines, maintaining ratio of step-width (Ts) and pulse width (T) between 0.02 to 0.25, and making final step duration (Tf) greater than or equal to twice the step width (Ts) to optimize power supply of the Liquid Crystal Display and apply a correction voltage if the distortion is significant and modifying the step sizes to reduce the supply voltage of the driver.

Abstract: In various embodiments, the largest transition in the select waveform of successive approximation technique is eliminated to reduce power dissipation in liquid crystal displays. Power dissipation in the driver circuit is analyzed for gray scale images for several select sequences. They are compared and new select sequences are proposed to achieve low power dissipation. A combination of pulse width modulation for MSBs and pulse height modulation for LSBs to form discrete trapezoidal waveforms is used to reduce peak amplitude of select and data waveforms and achieve a low supply voltage and low power dissipation in the driver circuit.

Abstract: Despite rapid advances in science and technology of liquid crystal display (LCD); elimination of motion related artifacts and preservation of color purity in moving images have remained elusive because gray-scale to gray-scale response time, i.e., time taken to switch pixels from one gray-scale to another depends on the initial and final gray shades. A technique wherein gray scale to gray scale response times are less dependent on the initial and final gray shades as compared to other addressing techniques for driving matrix LCD is reported. We also found that the response times are about the same as that of a pixel driven with simple square waveforms and therefore the effect of duty cycle due to matrix addressing is minimal with distributed waveforms of this technique.

Abstract: Instant invention is related to a method to display gray shades in RMS responding display matrix, comprising acts of: selecting each row of the display matrix with a set of “s” discrete select voltages in a sequence or random and applying a set of discrete data voltages to a column of the display matrix wherein the data voltages are of both polarities and energy of the select and data waveforms that are applied to rows and columns are constants during the “s” time intervals for all the rows and columns to display gray shades in RMS responding display matrix.

Abstract: A system and method to drive display matrix, comprising: a voltage level generator to provide predetermined voltages, a row voltage selector to select a group of voltages from the voltage level generator depending on select vector to drive row drivers, a column voltage selector to select a group of voltages from the voltage level generator depending on data vector to drive column drivers, and a controller to generate control signals to scan the display as dictated by addressing technique.

Abstract: A method for line-by-line addressing of RMS responding display matrix with wavelets, said method comprises steps of: selecting the wavelets such that energy of them is proportional to an integer power of two to form an orthogonal matrix; obtaining select waveform profile by summing elements of column in the wavelet matrix; obtaining column waveforms by dot product of data with column of the wavelet matrix; and applying the select waveforms and the corresponding column waveforms by selecting one row of the display matrix at a time.

Abstract: Power consumption in liquid crystal displays is analyzed by including frequent polarity reversals and duty cycle control. A multi-step voltage profile is proposed to reduce the power consumption in multiplexed and non-multiplexed displays. The present invention relates to a method to optimize power consumption in Liquid Crystal Display, wherein said method comprises steps of: applying multi-step waveform for selecting pre-determined address lines, maintaining ratio of step-width (Ts) and pulse width (T) between 0.02 to 0.25, and making final step duration (Tf) greater than or equal to twice the step width (Ts) to optimize power supply of the Liquid Crystal Display and apply a correction voltage if the distortion is significant and modifying the step sizes to reduce the supply voltage of the driver.