Method and Apparatus of Grayscale Image Generation in Monochrome Display
First Claim
1. A method of grayscale image display signal driving in a monochrome display panel, comprising:
- activating each scan line in T number of timeslots within each frame, wherein only one scan line is activated at any one timeslot;
driving each data line by one of ON or OFF driving signal waveform cycle during each timeslot within each frame, wherein all ON driving signal waveform cycles have identical signal waveform duty ratio and current amplitude;
wherein brightness of a pixel is determined by total number of timeslots having ON driving signal waveform cycles driven on a data line connected to the pixel; and
wherein the grayscale image pixel gray level information is stored in a display memory space shared by image display data.
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Abstract
A method is provided that allows the use of monochrome PMOLED display driver to generate grayscale patterns without the need to change the resolution of the 1-bit digital-to-analog converter (DAC) on the data line (SEG). The method further allows the elimination of extra frame buffer display memory needed by conventional techniques. This is achieved by swapping display memory space for display image pixel color (grayscale) depth in the expense of display resolution. The method further allows grayscale pattern data to be written into frame buffer only once without additional control from the host controller. The method further allows the dynamic application of grayscale on selectable whole or portion of a scan line such that full grayscale image display or a mixture of monochrome and grayscale image display in a single display panel is possible.
6 Citations
20 Claims
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1. A method of grayscale image display signal driving in a monochrome display panel, comprising:
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activating each scan line in T number of timeslots within each frame, wherein only one scan line is activated at any one timeslot; driving each data line by one of ON or OFF driving signal waveform cycle during each timeslot within each frame, wherein all ON driving signal waveform cycles have identical signal waveform duty ratio and current amplitude; wherein brightness of a pixel is determined by total number of timeslots having ON driving signal waveform cycles driven on a data line connected to the pixel; and wherein the grayscale image pixel gray level information is stored in a display memory space shared by image display data. - View Dependent Claims (2, 3, 4, 5, 17)
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6. A method of grayscale image display signal driving in a monochrome display panel, comprising:
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activating each scan line in T number of timeslots within each frame, wherein only one scan line is activated at any one timeslot; driving each data line by one of ON or OFF driving signal waveform cycle during each timeslot within each frame, wherein the ON driving signal waveform cycles vary, in terms of signal waveform duty ratio or current amplitude, in specific order in different timeslots; wherein brightness of a pixel is determined by total number of timeslots having ON driving signal waveform cycles driven on a data line connected to the pixel; and wherein the grayscale image pixel gray level information is stored in a display memory space shared by image display data. - View Dependent Claims (7, 8, 9, 10, 18)
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11. A method of grayscale image display signal driving in a display panel, comprising:
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activating each scan line in T number of timeslots within each frame, wherein only one scan line is activated at any one timeslot, wherein T is larger than one; driving each data line by one of Y number of different driving signal waveforms during each timeslot within each frame, wherein each of the Y number of different driving signal waveforms corresponds to one possible pixel grayscale level; wherein brightness of a pixel is determined by a sum of the driving signal waveforms during the activated-scan line timeslots driven on a data line connected to the pixel. - View Dependent Claims (12, 13, 19)
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14. A method of grayscale image display signal driving in a display panel, comprising:
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activating each scan line in two timeslots within each frame, wherein only one scan line is activated at any one timeslot; driving each data line by one of Y number of different driving signal waveforms during a first timeslot within each frame, wherein each of the Y number of different driving signal waveforms corresponds to one possible pixel grayscale level; driving each data line by one of Y number of different driving signal waveforms having magnitudes divided by a factor of Y during a second timeslot within each frame; wherein brightness of a pixel is determined by a sum of the driving signal waveforms during the activated-scan line timeslots driven on a data line connected to the pixel. - View Dependent Claims (15, 16, 20)
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Specification