# US 2018/0322830 A1 · Organic light emitting diode pixel compensation method, organic light emitting diode pixel compensation device and display device

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- Number: US 2018/0322830 A1
- Document ID: US20180322830A1
- Status: Published application
- Kind: A1
- Application number: 15/869,625
- Filed: 2018-01-12
- Published: 2018-11-08
- Earliest claimed: 2017-05-04
- Assignees: Boe Technology Group Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.
- Inventors: Pan XU
- Web page: https://patentgrep.com/patent/US20180322830A1

## CPC

- G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element
- G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)}
- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- H10K 71/70: Testing, e.g. accelerated lifetime tests
- G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing
- G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G 2310/0264: Details of driving circuits
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- 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)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An organic light emitting diode pixel compensation method, an organic light emitting diode pixel compensation device and a display device are provided. The organic light emitting diode pixel compensation method includes: testing drive transistors of sub-pixels in an Nth row to obtain first test information; testing drive transistors of sub-pixels in an Mth row to obtain second test information; calculating a compensation parameter based on the first test information and the second test information; and compensating the sub-pixels in the Nth row, the sub-pixels in the Mth row and the sub-pixels in a rows adjacent to the Nth row and the Mth row based on the compensation parameter, where N=an+b, M=an+c, a≥2, 0≤b<a, 0≤c<a, and a, b, c and n are each an integer.

## Claims

### Claim 1

An organic light emitting diode pixel compensation method, comprising:
testing drive transistors of sub-pixels in an Nth row to obtain first test information;
testing drive transistors of sub-pixels in an Mth row to obtain second test information;
calculating a compensation parameter based on the first test information and the second test information; and
compensating the sub-pixels in the Nth row, the sub-pixels in the Mth row and the sub-pixels in a rows adjacent to the Nth row and the Mth row based on the compensation parameter,
wherein N=an+b, M=an+c, a≥2, 0≤b<a, 0≤c<a, and a, b, c and n are each an integer.

### Claim 2 (depends on 1)

The organic light emitting diode pixel compensation method according to claim 1, wherein N is an odd or even number, and M is an odd or even number.

### Claim 3 (depends on 1)

The organic light emitting diode pixel compensation method according to claim 1, wherein the testing the drive transistors of the sub-pixels in the Nth row and obtaining the first test information and testing the drive transistors of the sub-pixels in the Mth row and obtaining the second test information comprises:
applying a test signal voltage to a control terminal of each drive transistor through a data line, to turn on the drive transistor;
charging a test capacitor through an output current of the drive transistor; and
detecting a voltage of the test capacitor and obtaining output current data of the drive transistor based on the voltage of the test capacitor,
wherein the first test information and the second test information each comprises the test signal voltage and the output current data.

### Claim 4 (depends on 1)

The organic light emitting diode pixel compensation method according to claim 1, wherein the testing the drive transistors of the sub-pixels in the Nth row and obtaining the first test information and testing the drive transistors of the sub-pixels in the Mth row and obtaining the second test information comprises:
applying a test signal voltage to a control terminal of each drive transistor through a data line, to turn on the drive transistor; and
acquiring output current data of the drive transistor,
wherein the first test information and the second test information each comprises a test signal voltage and the output current data.

### Claim 5 (depends on 3)

The organic light emitting diode pixel compensation method according to claim 3, wherein the compensation parameter comprises a threshold voltage and mobility.

### Claim 6 (depends on 5)

The organic light emitting diode pixel compensation method according to claim 5, wherein the calculating the compensation parameter based on the first test information and the second test information comprises:
calculating the compensation parameter based on the following formulas:
I1=K*u(Vgs1−Vth)2
I2=K*u(Vgs2−Vth)2
where I1 is the output current data in the first test information, I2 is the output current data in the second test information, Vgs1 is the test signal voltage in the first test information, Vgs2 is the test signal voltage in the second test information, u is the mobility, and Vth is the threshold voltage.

### Claim 7 (depends on 1)

The organic light emitting diode pixel compensation method according to claim 1, further comprising: testing the drive transistors of the sub-pixels in the Nth row and the Mth row during a data blank time period of each frame.

### Claim 8 (depends on 4)

The organic light emitting diode pixel compensation method according to claim 4, wherein the compensation parameter comprises a threshold voltage and mobility.

### Claim 9 (depends on 1)

The organic light emitting diode pixel compensation method according to claim 1, wherein N is an odd number, M is an even number following N, and the compensating the sub-pixels in the Nth row, the sub-pixels in the Mth row and the sub-pixels in a rows adjacent to the Nth row and the Mth row based on the compensation parameter comprises:
compensating the sub-pixels in the Nth row and the sub-pixels in the Mth row based on the compensation parameter.

### Claim 10 (depends on 1)

The organic light emitting diode pixel compensation method according to claim 1, wherein N and M are each an odd number, and the compensating the sub-pixels in the Nth row, the sub-pixels in the Mth row and the sub-pixels in a rows adjacent to the Nth row and the Mth row comprises:
compensating the sub-pixels in the Nth row, the sub-pixels in the Mth row and the sub-pixels in odd-numbered rows adjacent to the Nth row and the Mth row based on the compensation parameter.

### Claim 11 (depends on 10)

The organic light emitting diode pixel compensation method according to claim 10, wherein N and M are each an even number, and the compensating the sub-pixels in the Nth row, the sub-pixels in the Mth row and the sub-pixels in a rows adjacent to the Nth row and the Mth row further comprises:
compensating the sub-pixels in the Nth row, the sub-pixels in the Mth row and the sub-pixels in even-numbered rows adjacent to the Nth row and the Mth row based on the compensation parameter.

### Claim 12 (depends on 1)

The organic light emitting diode pixel compensation method according to claim 1, wherein N and M are each an even number, and the compensating the sub-pixels in the Nth row, the sub-pixels in the Mth row and the sub-pixels in a rows adjacent to the Nth row and the Mth row comprises:
compensating the sub-pixels in the Nth row and the sub-pixels in odd-numbered rows adjacent to the Nth row based on the compensation parameter; and
compensating sub-pixels in the Mth row and the sub-pixels in odd-numbered rows adjacent to the Mth row based on the compensation parameter.

### Claim 13

An organic light emitting diode pixel compensation device, comprising:
a first test information obtaining module, configured to test drive transistors of sub-pixels in an Nth row to obtain first test information;
a second test information obtaining module, configured to test drive transistors of sub-pixels in an Mth row to obtain second test information;
a compensation parameter obtaining module, configured to calculate a compensation parameter based on the first test information and the second test information; and
a pixel compensating module, configured to compensate the sub-pixels in every row based on the compensation parameter,
wherein N=an+b, M=an+c, a≥2, 0≤b<a, 0≤c<a, and a, b, c and n are each an integer.

### Claim 14 (depends on 13)

A display device, comprising the organic light emitting diode pixel compensation device according to claim 13.

### Claim 15 (depends on 14)

The display device according to claim 14, further comprising:
a display panel, comprising a plurality of sub-pixels arranged in an array form, a plurality of scan lines and data lines coupled to every sub-pixels;
a source electrode driver, coupled to the organic light emitting diode pixel compensation device and configured to generate a raw data signal and output, to the data lines, a compensated data signal formed by compensating the raw data signal through the organic light emitting diode pixel compensation device; and
a gate electrode driver, coupled to the scan lines and configured to generate a scan signal and output the scan signal to the scan lines of the display panel.