ACTIVE MATRIX ORGANIC LIGHT-EMITTING DIODE DISPLAY AND METHOD FOR DRIVING THE SAME
First Claim
1. A method for driving an active matrix organic light-emitting diode (AMOLED) display having organic light-emitting diodes (OLED) arranged in rows and columns, a pixel circuit for driving an OLED, a scan line for selecting the pixel circuits of each row and a data line for controlling the pixel circuits of each column and supply lines connectable to the anodes and cathodes of the AMOLED pixels, comprising:
- decomposing image data into a plurality of subframes based on a dependence of physical characteristics of the AMOLED display;
generating binary subframe signals according to the decomposed subframes;
activating an organic light emitting diode, based on a scan signal on the scan line and a generated subframe signal applied on the data line, allowing or blocking a current to flow via the supply lines through the organic light emitting diode; and
connecting the supply lines to a voltage source for a predetermined duration for each subframe.
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Abstract
In one exemplary embodiment, a method for driving an AMOLED display having OLED arranged in rows and columns, a pixel circuit for driving an OLED, a scan line for selecting the pixel circuits of each row and a data line for controlling the pixel circuits of each column and supply lines connectable to the anodes and cathodes of the AMOLED pixels may be described. The method may be steps for decomposing image data into a plurality of subframes based on a dependence of physical characteristics of the AMOLED display; generating binary subframe signals according to the decomposed subframes; activating an OLED, based on a scan signal on the scan line and a generated subframe signal applied on the data line, allowing or blocking a current to flow through the organic light emitting diode; and connecting the supply lines to a voltage source for a predetermined duration for each subframe.
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Citations
33 Claims
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1. A method for driving an active matrix organic light-emitting diode (AMOLED) display having organic light-emitting diodes (OLED) arranged in rows and columns, a pixel circuit for driving an OLED, a scan line for selecting the pixel circuits of each row and a data line for controlling the pixel circuits of each column and supply lines connectable to the anodes and cathodes of the AMOLED pixels, comprising:
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decomposing image data into a plurality of subframes based on a dependence of physical characteristics of the AMOLED display; generating binary subframe signals according to the decomposed subframes; activating an organic light emitting diode, based on a scan signal on the scan line and a generated subframe signal applied on the data line, allowing or blocking a current to flow via the supply lines through the organic light emitting diode; and connecting the supply lines to a voltage source for a predetermined duration for each subframe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 15, 33)
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8. A method for the determination of a sequence of binary-value subframes used for addressing and driving an AMOLED display from a gray-value or a color value image, comprising the steps:
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obtaining a binary value subframe from a remaining image by comparing the gray or color values with a predetermined threshold value; simulating a pixel-wise luminance distribution of the AMOLED display, based on the binary subframe and the predetermined time factor; subtracting the pixel-wise luminance distribution of the AMOLED display from the actual remaining image data in order to calculate a next remaining image data; and iterating the above steps with a next remaining image instead of the remaining image. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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16. A method for simulating a pixel current distribution of an AMOLED display, wherein the display comprises a matrix of AMOLED pixels, arranged in rows and columns, wherein all AMOLED pixels are driven digitally, wherein all AMOLED pixels in a column are connected to a supply line for that column, wherein at least one end of the supply line is either connected or switched to the voltage source comprising, for a column of AMOLED pixels in the matrix, the steps of:
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estimating a value for a voltage/current for a selected node of the column; calculating at least one of a voltage value and a current value for remaining nodes of the column, based on one of an estimated voltage or current value; and iterating the previous steps in order to reduce a difference between a calculated voltage or current value and a real voltage or current value at a chosen location of the column. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A device for driving an active matrix organic light-emitting diode (AMOLED) display, the display comprising organic light-emitting diodes (OLED) arranged in rows and columns, a pixel circuit for driving an OLED, a scan line for selecting the pixel circuits of each row and a data line for controlling the pixel circuits of each column and supply lines connectable to the anodes and cathodes of the AMOLED pixels, comprising:
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a circuit that decomposes the image data into several subframes in dependence of the physical characteristics of the AMOLED display; a circuit that generates binary subframe signals according to the decomposed subframes; a circuit that activates an organic light emitting diode, based on a scan signal on the scan line and a generated subframe signal applied on the data line, and that allows or blocks a current from flowing through the organic light emitting diode; and a circuit that connects the supply lines to a voltage source for a predetermined duration for each subframe.
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30. A device for the determination of a sequence of binary-value subframes used for addressing/driving an AMOLED display from one of a gray-value or a color value image, comprising:
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a circuit that obtains a binary value subframe from one of a gray value or color value remaining image by comparing the gray or color values with a predetermined threshold value; a circuit that simulates a pixel-wise luminance distribution of the AMOLED display, based on the binary value subframe and a predetermined time factor; a circuit that subtracts the pixel-wise luminance distribution of the AMOLED display from the remaining image data in order to calculate the next remaining image data.
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31. A device for simulating a pixel current distribution of an AMOLED display, wherein the display comprises a matrix of AMOLED pixels, arranged in rows and columns, wherein all AMOLED pixels are driven digitally, wherein all AMOLED pixels in a column are connected to a supply line for that column, wherein at least one end of the supply line is connected/switched to the voltage source,
comprising, for at least one of a column or a row of AMOLED pixels in the matrix: -
a circuit that estimates at least one of a voltage or a current for a selected node of the at least column or row; a circuit that estimates the voltage/current values for the remaining nodes of the at least column or row, based on an estimated value of the voltage or the current; a circuit that repeats the previous steps in order to reduce the difference between the calculated and the real voltage or current value at a chosen location of the at least column or row.
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32. An active matrix organic light-emitting diode (AMOLED) display module comprising:
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an active matrix organic light-emitting diodes (OLED) display, a device that determines a sequence of binary-value subframes used for addressing/driving an AMOLED display from one of a gray-value or a color value image, through simulation of a pixel current distribution of a digitally driven AMOLED display, and a device that connects the supply lines of an AMOLED display to a voltage source for a predetermined duration for each subframe, wherein at least one supply side of the AMOLED display, anode and/or cathode, is structured in parallel lines with one line for each column/row.
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Specification