Raman Research Institute Patent applications |
Patent application number | Title | Published |
20130063469 | METHOD TO DISPLAY AN IMAGE ON A DISPLAY DEVICE - In one embodiment, a method a method of displaying an image on a display device is described. The display device includes a plurality of clusters. Each cluster has a plurality of pixels and an independent light source associated therewith. Each of the plurality of clusters are illuminated with their associated independent light source. The plurality of pixels in a cluster are refreshed with bits of gray scale. Simultaneously with the refreshing, the light source associated with the cluster where the plurality of pixels are being refreshed is switched off. When the plurality of pixels have been refreshed, the light source is switched on with a predetermined intensity of light. Each of the clusters are refreshed at a rate that is fast enough to eliminate flicker. | 03-14-2013 |
20110261094 | METHOD TO DISPLAY IMAGES ON A DISPLAY DEVICE USING BIT SLICE ADDRESSING TECHNIQUE - Optical and electronic means of addressing are combined to flash bit-sliced images rapidly in a sequential manner to achieve enormous reduction in circuit as well as cost of data drivers in display devices. Also, light source i.e. backlight or front light switching scheme is used to reduce power consumption of light source in display devices for both static and dynamic images with high contrast. Bit slice addressing (BSA) preserves colour purity of images at all angles in fast responding liquid crystal displays with simple data drivers. Colour purity of images is also preserved at all angles of view due to a viewing angle characteristic of bit slice addressing that is independent of gray shades. | 10-27-2011 |
20100277461 | SYSTEMS AND METHODS TO DRIVE AN LCD - 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. | 11-04-2010 |
20100238103 | Method to Obtain Uniform Grayscale to Grayscale Response Times in LCDs and a System Thereof - 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. | 09-23-2010 |
20090002300 | System and method to drive display matrix - 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. | 01-01-2009 |
20080316231 | Method and System for Line By Line Addressing of RMS Responding Display Matrix with Wavelets - 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. | 12-25-2008 |
20080303772 | Method and device to optimize power consumption in liquid crystal display - 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 (T | 12-11-2008 |