Multi-line addressing methods and apparatus
First Claim
1. An emissive display comprising:
- a plurality of pixels each addressable by a row electrode and a column electrode; and
a display driver, said display driver comprising;
means for driving a plurality of said column electrodes with a first set of column drive signals;
means for driving a first group of two or more of said row electrodes with a first set of forward bias row drive signals at the same time as said column electrode driving with said first column drive signals, wherein said first set of forward bias row drive signals is to cause a plurality of pixels in each of two or more rows of the display to emit light at the same time;
means for driving said plurality of column electrodes with a second set of column drive signals;
means for driving a second group of two or more row electrodes with a second set of forward bias row drive signals at the same time as said column electrode driving with said second column drive signals, wherein said second set of forward bias row drive signals is to cause pixels in two or more rows of the display to emit light at the same time; and
means for selecting row electrodes of said first group of two or more row electrodes based on correlation or expected correlation between rows of image data and for selecting row electrodes of said second group of row electrodes based on correlation or expected correlation between rows of image data,wherein the means for selecting is for selection of said first and second column drive signals and said row electrodes of said first and second groups such that a desired luminescence of said OLED pixels driven by said row and column electrodes is obtained by a substantially linear sum of luminances determined by said first row and column drive signals and luminances determined by said second row and column drive signals and to thereby build up a luminescence profile of a said row over a plurality of row scan periods.
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Abstract
This invention relates to methods and apparatus for driving emissive, in particular organic light emitting diodes (OLED), displays using multi-line addressing (MLA) techniques. Embodiments of the invention are particularly suitable for use with so-called passive matrix OLED displays. A method of driving an emissive display, the display comprising a plurality of pixels each addressable by a row electrode and a column electrode, the method comprising: driving a plurality of column electrodes with a first set of column drive signals; and driving two or more row electrodes with a first set of forward bias row drive signals at the same time as the column electrode driving with the column drive signals; then driving the plurality of column electrodes with a second and subsequent sets of column drive signals; and driving the two or more row electrodes with a second and subsequent sets of forward bias row drive signals at the same time as the column electrode driving with the second column drive signals.
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Citations
11 Claims
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1. An emissive display comprising:
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a plurality of pixels each addressable by a row electrode and a column electrode; and
a display driver, said display driver comprising;means for driving a plurality of said column electrodes with a first set of column drive signals; means for driving a first group of two or more of said row electrodes with a first set of forward bias row drive signals at the same time as said column electrode driving with said first column drive signals, wherein said first set of forward bias row drive signals is to cause a plurality of pixels in each of two or more rows of the display to emit light at the same time; means for driving said plurality of column electrodes with a second set of column drive signals; means for driving a second group of two or more row electrodes with a second set of forward bias row drive signals at the same time as said column electrode driving with said second column drive signals, wherein said second set of forward bias row drive signals is to cause pixels in two or more rows of the display to emit light at the same time; and means for selecting row electrodes of said first group of two or more row electrodes based on correlation or expected correlation between rows of image data and for selecting row electrodes of said second group of row electrodes based on correlation or expected correlation between rows of image data, wherein the means for selecting is for selection of said first and second column drive signals and said row electrodes of said first and second groups such that a desired luminescence of said OLED pixels driven by said row and column electrodes is obtained by a substantially linear sum of luminances determined by said first row and column drive signals and luminances determined by said second row and column drive signals and to thereby build up a luminescence profile of a said row over a plurality of row scan periods. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification