Motion pixel distortion reduction for digital display devices using dynamic programming coding

• Main Author: ZHU; DANIEL QIANG
• Format: Patent
• Language: English
• Published: 08.08.2000
• Edition: 7
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DISPLAY; EDUCATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEALS

A digital display device, such as a plasma display or a digital DMD based light digital project employs a minimum moving pixel distortion (MPD) set of codewords for reducing visually perceived artifacts viewed on a DDD, specially on a plasma display panel (PDP). The plasma display device includes a minimum MPD mapping process, which maps by, for example, a ROM look-up table, received pixel intensity values into intensity levels corresponding to selected ones of the set of codewords. By increasing the number of subfields (or rounding the least significant bits (LSBs) of the intensity pixels), redundant codewords that express pixel intensities can be generated based on the sustain pulse vector with predetermined constraints. An optimal set of codewords can be determined using a dynamic programming method which minimizes a measure of apparent error in a transition from a gray scale produced by one codeword to a gray scale produced by a next successive codeword. The optimal codewords are stored in a ROM lookup table as display data by a plasma display controller. The plasma display controller then provides the display data, line by line, to the plasma display panel (PDP) using a scan driver and a data driver. Once the display data is loaded into the PDP for an image, the plasma display controller enables the sustain pulse drivers to illuminate the addressed cells with the intended sustain pulse train encoded by the codeword.