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Image processing systems

An image and image data technology, applied in the field of image processing systems, can solve problems such as limiting independent control

Inactive Publication Date: 2009-06-03
CAMBRIDGE DISPLAY TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

OLEDs have quadratic voltammetric dependencies that limit independent control of row and column drive variables

Method used

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Embodiment Construction

[0052]Referring back to the NMF method described above, in one embodiment, starting from different (eg, random) starting points, the TMA frame averaging process performs the NMF calculation twice on the same image as described above. As previously stated, in general, an image is initially represented by an object matrix Q which at the end of the process represents the difference between the object and the image produced by the computed sub-frame groups. The starting point of the process is defined by the initial contents of the row and column matrices R and C. Once two TMA calculations have been performed, the two groups of subframes are displayed sequentially at a sufficiently high refresh rate that, to the user (observer), the two images together on average give the impression of a single, target image. If the noise in the image resulting from the NMF calculation is random in nature, the noise is reduced.

[0053] In a variation of this procedure, a first TMA(NMF) calculati...

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Abstract

This invention generally relates to image processing systems, and more particularly to systems and methods for displaying images using multi-line addressing (MLA) or total matrix addressing (TMA) techniques, with reduced noise. Embodiments of the invention are particularly useful for driving OLED (organic light emitting diode) displays. A method of driving an electroluminescent display to displayan image, the method comprising: inputting image data for said image; determining, using said image data, a first set of image subframe data for a first plurality of image subframes each representinga common spatial portion of said image, wherein said first plurality of image subframes combine to approximate said common spatial portion of said image; driving said display using said first set of image subframe data; determining, using said image data, a second set of image subframe data for a second plurality of image subframes each representing said common spatial portion of said image, wherein said second plurality of image subframes combine to approximate said common spatial portion of said image; and driving said display using said second set of image subframe data.

Description

technical field [0001] Generally, the present invention relates to image processing systems. More particularly, it relates to systems and methods for displaying images using noise-reduced multi-line addressing (MLA) or total matrix addressing (TMA) techniques. Embodiments of the present invention are particularly useful for driving OLED (Organic Light Emitting Diode) displays. Background technique [0002] It has previously been described how the techniques of Multi-Line Addressing (MLA) and Total Matrix Addressing (TMA), specifically using Non-Negative Matrix Factorization (NMF), can be advantageously employed in driving OLED displays (see International Application PCT / GB2005 / 050219). A further improvement on these techniques is now described, where, in general, multiple frame groups are employed for noise reduction and image quality improvement. Prior art can be found in US2003 / 0214493; US2004 / 0257359; EP 0953956A; and GB 2327798A. [0003] Multi-line addressing and g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/2014G09G2330/025G09G2310/0205G09G2310/0208G09G2310/0297G09G3/3216G09G3/3266G09G3/2022G09G3/3283G02F1/061G09G3/3208G09G3/3681G09G3/3644H10K59/17
Inventor 尤安·克里斯托弗·史密斯彼特·麦史阿德里安·卡贝尔
Owner CAMBRIDGE DISPLAY TECH LTD