# US 11,308,891 B2 · Organic light emitting diode display device in which adjacent sub pixels share a single data line and driving method thereof wherein same-colored sub pixels continue to emit light based on a unit of horizontal periods

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- Number: US 11,308,891 B2
- Document ID: US11308891B2
- Status: Granted
- Kind: B2
- Application number: 17/022,458
- Filed: 2020-09-16
- Published: 2021-05-20
- Granted: 2022-04-19
- Earliest claimed: 2019-11-15
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Hyunwoo Byun; Byungchan Song
- Web page: https://patentgrep.com/patent/US11308891B2

## CPC

- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
- G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)}
- G09G 3/2014: {by modulation of the duration of a single pulse during which the logic level remains constant}
- G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element
- G09G 3/3275: Details of drivers for data electrodes
- G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
- G09G 2310/0213: controlling the sequence of the scanning lines with respect to the patterns to be displayed, e.g. to save power
- G09G 2310/067: Special waveforms for scanning, where no circuit details of the gate driver are given
- G09G 2370/08: Details of image data interface between the display device controller and the data line driver circuit
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

Discussed is a display device including an organic light emitting diode display panel where sub pixels adjacent to each other along a direction of a gate line are paired and arranged to share a single data line. In order for the sub pixels to be driven according to a DRD method, a timing controller aligns image data and transmits the aligned image data to a data driver so that same-colored sub pixels continue to emit light based on a unit of a plurality of predetermined horizontal periods, and generates gate and data control signals and supplies the control signals to the gate and data drivers so that a predetermined driving period of the sub pixels is changed.

## Claims

### Claim 1

An organic light emitting diode display device, comprising:
an organic light emitting diode display panel where sub pixels adjacent to each other along a direction of a gate line among gate lines are paired and arranged to share a single data line among data lines in pixel areas defined by the gate lines and the data lines;
a timing controller configured to align and output image data so that same-colored sub pixels continue to emit light based on a unit of a plurality of predetermined horizontal periods, and to generate gate and data control signals so that a predetermined driving period of sub pixels is changed;
a gate driver configured to change an output period of gate-on signals according to the gate control signal, and to consecutively supply the gate-on signals with changed output period to the gate lines; and
a data driver configured to generate a data voltage corresponding to the image data aligned by the timing controller, and to output the data voltage to each of the data lines so that the data voltage is synchronized with a timing of supply of the gate-on signal according to the data control signal.

### Claim 2 (depends on 1)

The organic light emitting diode display device of claim 1, wherein for the organic light emitting diode display panel,
the total number of all of the data lines is half the total number of entire pixel columns, and the total number of all of the gate lines is twice the total number of entire pixel rows,
each pixel is disposed in a pixel area defined by two gate lines and a single data line that are crossed, and
each pixel is paired with an adjacent pixel in the direction of the gate line and shares a single data line with the adjacent pixel.

### Claim 3 (depends on 2)

The organic light emitting diode display device of claim 2, wherein pixels adjacent to each other in a direction of the data line respectively receive a gate-on signal from different gate lines,
pixels in (4n−3)th pixel columns and pixels in 4nth pixel columns among pixels arranged in a same pixel row receive a gate-on signal from (2n−1)th gate lines that are odd-numbered gate lines closest to them, where n is a positive number, and
pixels in (4n−2)th pixel columns and pixels in (4n−1)th pixel columns among pixels arranged in the same pixel row connect to receive a gate-on signal from 2mth gate lines that are even-numbered gate lines closest to them, where m is a positive number.

### Claim 4 (depends on 1)

The organic light emitting diode display device of claim 1, wherein the timing controller is further configured to align the image data based on a unit of each frame and transmit the aligned image data to the data driver to allow a driving order of each of the sub pixels to be changed and to allow each of the sub pixels to be driven based on a unit of at least one frame while allowing same-colored sub pixels arranged along a direction of the data line to continue to emit light based on a plurality of horizontal periods.

### Claim 5 (depends on 4)

The organic light emitting diode display device of claim 4, wherein the timing controller comprises:
a signal modulator configured to modulate a pulse width of a data enable signal, and to generate and output the modulated data enable signal so that a charge period of first sub pixels among a plurality of sub pixels preconfigured to continue to display a same color is lengthened by a predetermined period;
a line memory configured to align and output the image data so that the plurality of sub pixels preconfigured to continue to display the same color continues to emit light based on the unit of the plurality of horizontal periods while the plurality of sub pixels emits light according to a double rating driving (DRD) method;
a data control signal generator configured to generate the data control signal so that a charge period of the first sub pixels is lengthened by a predetermined period using a synchronization signal including the modulated data enable signal; and
a gate control signal generator configured to generate a gate control signal so that a charge period of the first sub pixels is lengthened by a predetermined period using a synchronization signal including the modulated data enable signal.

### Claim 6 (depends on 5)

The organic light emitting diode display device of claim 5, wherein the line memory is further configured to align the image data and consecutively transmit the aligned image data to the data driver so that an output period of image data displayed on the first sub pixels is lengthened based on the modulated data enable signal to lengthen a period of supply of a data voltage to the first sub pixels.

### Claim 7 (depends on 5)

The organic light emitting diode display device of claim 5, wherein the line memory is further configured to align the image data based on the modulated data enable signal so that a period, during which the data voltage is supplied to the first sub pixels among the rest of the sub pixels preconfigured to continue to display the same color, is longer than a period during which the data voltage is supplied to the rest of the sub pixels configured to display the same color.

### Claim 8 (depends on 5)

The organic light emitting diode display device of claim 5, wherein the line memory is further preconfigured to shorten a charge period of the rest of the sub pixels preconfigured to continue to display the same color except the first sub pixels configured to display the same color by a period that is calculated by dividing the lengthened charge period of the first sub pixels by the total number of the rest of the sub pixels and to output the aligned image data.

### Claim 9 (depends on 5)

The organic light emitting diode display device of claim 5, wherein the data control signal generator is further configured to modulate an output width of a source output enable signal using the modulated data enable signal.

### Claim 10 (depends on 5)

The organic light emitting diode display device of claim 5, wherein the gate control signal generator is further configured to modulate an output width of a gate output enable signal using the modulated data enable signal.

### Claim 11 (depends on 5)

The organic light emitting diode display device of claim 5, wherein the signal modulator is configured to modulate a pulse width of the data enable signal and generate the modulated data enable signal so that a charge period of the rest of the sub pixels preconfigured to continue to display the same color except the first sub pixel is shortened by a period calculated by dividing the lengthened charge period of the first sub pixel by the total number of the rest of the sub pixels.

### Claim 12 (depends on 5)

The organic light emitting diode display device of claim 5, wherein the signal modulator is further configured
to modulate a pulse width of the data enable signal and to generate the modulated data enable signal so that a charge period of a first sub pixel among every two sub pixels configured to continue to display the same color is lengthened by a predetermined period versus a predetermined 1 horizontal period, and
to modulate a pulse width of the data enable signal and to generate the modulated data enable signal so that a charge period of the rest of the sub pixels preconfigured to continue to display the same color except the first sub pixel is shortened by the lengthened charge period of the first sub pixel.

### Claim 13 (depends on 5)

The organic light emitting diode display device of claim 5, wherein the signal modulator is further configured
to modulate a pulse width of the data enable signal and to generate the modulated data enable signal so that a charge period of a first sub pixel among three or more sub pixels configured to continue to display the same color is lengthened by a predetermined period versus a predetermined 1 horizontal period, and
to modulate a pulse width of the data enable signal and to generate the modulated data enable signal so that a charge period of the rest of the sub pixels preconfigured to continue to display the same color except the first sub pixel is shortened by a period calculated by dividing the lengthened charge period of the first sub pixel by the total number of the rest of the sub pixels.

### Claim 14 (depends on 1)

The organic light emitting diode display device of claim 1, wherein the timing controller is further to align the image data so that the data voltage continues to be supplied to same-colored pixels in first and second pixel rows of odd-numbered pixel columns after the data voltage is supplied to pixels in a first pixel row of the even-numbered pixel columns connected to odd-numbered data lines, during even-numbered frame periods, to align the image data so that the data voltage continues to be supplied to same-colored pixels in second and third pixel rows of the even-numbered pixel columns and continues to be supplied again to same-colored pixels in third and fourth pixel rows of the odd-numbered pixel columns.

### Claim 15

A diving method of an organic light emitting diode display device provided with an organic light emitting diode display panel where pixels adjacent to each other along a direction of a gate line are paired and arranged to share a single data line in pixel areas defined by a plurality of gate and data lines, the driving method comprising:
aligning and outputting image data so that same-colored sub pixels continue to emit light based on a unit of a plurality of predetermined horizontal periods, and generating and outputting gate and data control signals so that a predetermined driving period of sub pixels is changed;
changing an output period of gate-on signals according to the gate control signal, and to consecutively supply the output period to the gate lines; and
generating a data voltage corresponding to the image data aligned by a timing controller, and outputting the data voltage to each of the data lines so that the data voltage is synchronized with a timing of supply of the gate-on signal according to the data control signal.

### Claim 16 (depends on 15)

The driving method of claim 15, wherein the step of aligning and outputting image data, comprises aligning the image data based on a unit of each frame to allow a driving order of each of the sub pixels to be changed and to allow each of the sub pixels to be driven based on a unit of at least one frame while same-colored sub pixels arranged along a direction of the data line continues to emit light based on the unit of a plurality of horizontal periods.

### Claim 17 (depends on 16)

The driving method of claim 16, wherein the step of aligning the image data based on a unit of each frame comprises aligning the image data in a line memory and consecutively transmitting the aligned image data to a data driver so that an output period of image data displayed on first sub pixels is lengthened based on a modulated data enable signal to lengthen a period of supply of a data voltage to the first sub pixels among same-colored sub pixels configured to continue to emit light.

### Claim 18 (depends on 17)

The driving method of claim 17, wherein the step of generating gate and data control signals comprises modulating a pulse width of a data enable signal and generating the modulated data enable signal so that a charge period of all sub pixels configured to continue to display a same color except the first sub pixel is shortened by a period calculated by dividing a lengthened charge period of the first sub pixel by the total number of all sub pixels configured to continue to display the same color except the first sub pixel.

### Claim 19 (depends on 17)

The driving method of claim 17, wherein the step of generating gate and data control signals comprises modulating a pulse width of a data enable signal and generating the modulated data enable signal so that a charge period of a first sub pixel among every two sub pixels configured to continue to display a same color is lengthened by a predetermined period versus a predetermined 1 horizontal period, and
modulating a pulse width of the data enable signal and generating the modulated data enable signal so that a charge period of all sub pixels configured to continue to display the same color except the first sub pixel is shortened by the lengthened charge period of the first sub pixel.

### Claim 20 (depends on 17)

The driving method of claim 17, wherein the step of generating gate and data control signals comprises modulating a pulse width of a data enable signal and generating the modulated data enable signal so that a charge period of a first sub pixel among three or more sub pixels configured to continue to display a same color is lengthened by a predetermined period versus a predetermined 1 horizontal period, and
modulating a pulse width of the data enable signal and generating the modulated data enable signal so that a charge period of all sub pixels configured to continue to display the same color except the first sub pixel is shortened by a period calculated by dividing a lengthened charge period of the first sub pixel by the total number of the rest of the sub pixels.