发明名称 |
METHOD OF COMPENSATING AMOLED POWER SUPPLY VOLTAGE DROP |
摘要 |
The present invention provides a method of compensating AMOLED power supply voltage drop, comprising: step 1, measuring a brightness value L of each light-emitting element line of a panel by starting from a COF end of the AMOLED; step 2, drawing a brightness variation curve of the each light-emitting element line caused by IR Drop according to the brightness value L of the each light-emitting element line measured in the step 1; step 3, calculating a voltage value for compensation of every two adjacent light-emitting elements from difference values between the brightnesses of every two adjacent light-emitting elements according to a ratio conversion between a brightness difference ΔL and a voltage difference ΔV, i.e. ΔV=α·ΔL, wherein α is a scaling factor; step 4, making no compensation to a data voltage of the first light-emitting element line, and adding the first compensation value ΔV1 to a data voltage of the second light-emitting element line, and adding a sum (ΔV1+ΔV2) of the first and the second compensation value to a data voltage of a third light-emitting element line and so on to the last light-emitting element line when a sequence controller transmits data voltage signals for showing images. The method can solve the issue of uneven brightness caused by IR Drop in a large scale AMOLED display device. |
申请公布号 |
US2016343304(A1) |
申请公布日期 |
2016.11.24 |
申请号 |
US201514423122 |
申请日期 |
2015.02.06 |
申请人 |
SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO.,LDT. |
发明人 |
HWANG Taijiun;LEE Jihshiang |
分类号 |
G09G3/3291;G09G3/3258 |
主分类号 |
G09G3/3291 |
代理机构 |
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代理人 |
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主权项 |
1. A method of compensating AMOLED power supply voltage drop, comprising steps of:
step 1, measuring a brightness value L of each light-emitting element line of a panel by starting from a COF end of the AMOLED; step 2, drawing a brightness variation curve of the each light-emitting element line caused by IR Drop according to the brightness value L of the each light-emitting element line measured in the step 1; step 3, calculating a voltage value for compensation of every two adjacent light-emitting elements from difference values between the brightnesses of every two adjacent light-emitting elements according to a ratio conversion between a brightness difference ΔL and a voltage difference ΔV, i.e. ΔV=α·ΔL, wherein a is a scaling factor; a voltage value for compensation required for a second light-emitting element line relative to a first light-emitting element line is a first compensation value ΔV1, and a voltage value for compensation required for a third light-emitting element line relative to the second light-emitting element line is a second compensation value ΔV2, and so on to a last light-emitting element line; step 4, making no compensation to a data voltage of the first light-emitting element line, and adding the first compensation value ΔV1 to a data voltage of the second light-emitting element line, and adding a sum (ΔV1+ΔV2) of the first and the second compensation value to a data voltage of a third light-emitting element line and so on to the last light-emitting element line when a sequence controller transmits data voltage signals for showing images. |
地址 |
Shenzhen, Guangdong CN |