A generalized addressing technique for RMS responding matrix LCDs

Manasa

Nethravathi

et al. 2006

J. Display Technol.

Self Cite

Abstract-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 each output) in the drivers. A simple controller was implemented in a low cost complex programmable logic device.Index Terms-Gray shades, liquid crystal displays (LCDs), matrix addressing, multi-line addressing (MLA), wavelets.

Section: Introductionmentioning

confidence: 99%

Integer Wavelets for Displaying Gray Shades in RMS Responding Displays

Manasa

Nethravathi

et al. 2006

J. Display Technol.

Self Cite

“…For example, the most popular line-by-line addressing technique [1] has four voltage levels in scanning as well as the data waveforms. Conventional line-by-line addressing technique [2] and the multiline addressing techniques like the Improved Hybrid Addressing Technique [3] and Sequency Addressing Technique [4] have three voltage levels in the scanning waveforms and two or more voltage levels in the data waveforms. The Active Addressing Technique [5] has two voltage levels in the row waveforms but a large number of voltages in the column waveforms.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, it is not easy to integrate drive electronics and digital system in a single chip. The binary addressing technique (BAT) [6], [7] is an exception. It has just two voltage levels in the scanning as well as the data waveforms.…”

Section: Introductionmentioning

confidence: 99%

Binary Addressing Technique With Duty Cycle Control for LCDs

IEEE Trans. Electron Devices

Govind

Ashoka

et al. 2005

Self Cite

Abstract-Introduction of duty cycle in the binary addressing technique is proposed to enable integration of liquid crystal display drivers with a digital system in a single chip. An analysis of this technique with duty-cycle control is presented. Effects of dutycycle control on brightness uniformity of pixels in the liquid crystal display are discussed. A system on chip implementation of the technique is also demonstrated.Index Terms-Displays, duty-cycle control, liquid crystal display ( LCD), matrix addressing and multiplexing.

“…(1) are shown in Eq. (2). (2) An x in the data matrix denotes a "don't care" condition because the corresponding element in the orthogonal matrix is zero.…”

Section: Techniquementioning

confidence: 99%

“…The hardware complexity of the data drivers is reduced as compared to that of the amplitude modulation. 2 Flicker in the display can be avoided even when the refresh rate is less compared to that of the frame modulation, i.e., frame-rate control. 3 …”

Section: Introductionmentioning

confidence: 99%

Design and implementation of a wavelet‐based addressing technique (WAT)

Shashidhara

2007

J Soc Info Display

-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 low-cost complex programmable logic device (CPLD) and it was demonstrated by displaying 16 gray shades in a liquid-crystal display.