LED video screen calibration system
LED display Brightness / Color uniformity calibration
Brightness / Color uniformity is of the most important factors that affect the image quality of a full color LED display. Because of the limitations of the manufacturing process, including system structure design, LED lights selection, electronic components welting, system cooling, LED brightness decaying and many others, LED displays suffer the brightness / color uniformity loss, which is also the most serious problem of this field.
Facing this fact, Nova pixel level calibration system does not intervene the manufacturing processing of a LED display to reduce its brightness / color uniformity. Instead, it performs brightness / color adjustment to the display after it has been completely produced. By adjusting the brightness / color of each LED light according to the software analytical results from the measured brightness / color values of the LED lights, Nova pixel level calibration system can help the LED display acquiring perfect uniformity.
Fig.1 The LED display effects comparison before and after calibration
NovaCLB is applicable for the following two occasions:
1）Factory single cabinet pixel level calibration (Factory calibration). Correct each cabinet on the production line to ensure good brightness / color uniformity of the cabinets when produced.
2）Field LED display pixel level calibration (Full-screen calibration). Perform calibration for a LED display at where it locates to improve its brightness / color uniformity.
Factory calibration is more efficient and lower in cost than Full-screen calibration. But for cabinets of which the LED lights optical axis directions consistency is not well managed, results of factory calibration will not be as good as that of filed calibration. When doing factory calibration, the matching NovaCLB-Cabinet 2012 is needed.
Full-screen calibration requires engineers to be presence and Full-screen installation of calibration instruments. And what’s more, Full-screen calibration can only be performed only at night when it’s dark. Despite its complexity and low efficiency (compared with factory calibration), Full-screen calibration can greatly improve the brightness / color uniformity of a LED display and thus results in amazing image quality of the display. When doing Full-screen calibration, the matching NovaCLB-Screen 2012 is needed.
Core Advantages of NovaCLB-Screen
1）Camera calibration technology enabling accurate brightness / color measurement;
2）Precise calibration coefficients up to 16bits resulting in outstanding calibration performance with brightness variation less than 1% and color variation less than 0.003;
3）Be capable of eliminating color diversity of LED lights from different manufacturing batches;
4）Be capable of eliminating brightness / color diversity between subareas or cabinets;
5）Arc shape and irregular shape LED display calibration supported;
6）Oblique cabinet calibration on production lines supported;
7）Supporting automatic calibration for the replaced module;
8）Perfect compatible with LED control systems;
9）Specific calibration algorithm enabling perfect calibration for low gray level range;
10）Close loop intelligent calibration resulting in easy and high efficiency calibration. One LED display, one person; 25 minutes, 600K pixels!
11）No extra power supply required.
System structure
Fig.2 system structure
Brightness / Color uniformity is of the most important factors that affect the image quality of a full color LED display. Because of the limitations of the manufacturing process, including system structure design, LED lights selection, electronic components welting, system cooling, LED brightness decaying and many others, LED displays suffer the brightness / color uniformity loss, which is also the most serious problem of this field.
Facing this fact, Nova pixel level calibration system does not intervene the manufacturing processing of a LED display to reduce its brightness / color uniformity. Instead, it performs brightness / color adjustment to the display after it has been completely produced. By adjusting the brightness / color of each LED light according to the software analytical results from the measured brightness / color values of the LED lights, Nova pixel level calibration system can help the LED display acquiring perfect uniformity.
Fig.1 The LED display effects comparison before and after calibration
NovaCLB is applicable for the following two occasions:
1）Factory single cabinet pixel level calibration (Factory calibration). Correct each cabinet on the production line to ensure good brightness / color uniformity of the cabinets when produced.
2）Field LED display pixel level calibration (Full-screen calibration). Perform calibration for a LED display at where it locates to improve its brightness / color uniformity.
Factory calibration is more efficient and lower in cost than Full-screen calibration. But for cabinets of which the LED lights optical axis directions consistency is not well managed, results of factory calibration will not be as good as that of filed calibration. When doing factory calibration, the matching NovaCLB-Cabinet 2012 is needed.
Full-screen calibration requires engineers to be presence and Full-screen installation of calibration instruments. And what’s more, Full-screen calibration can only be performed only at night when it’s dark. Despite its complexity and low efficiency (compared with factory calibration), Full-screen calibration can greatly improve the brightness / color uniformity of a LED display and thus results in amazing image quality of the display. When doing Full-screen calibration, the matching NovaCLB-Screen 2012 is needed.
Core Advantages of NovaCLB-Screen
1）Camera calibration technology enabling accurate brightness / color measurement;
2）Precise calibration coefficients up to 16bits resulting in outstanding calibration performance with brightness variation less than 1% and color variation less than 0.003;
3）Be capable of eliminating color diversity of LED lights from different manufacturing batches;
4）Be capable of eliminating brightness / color diversity between subareas or cabinets;
5）Arc shape and irregular shape LED display calibration supported;
6）Oblique cabinet calibration on production lines supported;
7）Supporting automatic calibration for the replaced module;
8）Perfect compatible with LED control systems;
9）Specific calibration algorithm enabling perfect calibration for low gray level range;
10）Close loop intelligent calibration resulting in easy and high efficiency calibration. One LED display, one person; 25 minutes, 600K pixels!
11）No extra power supply required.
System structure
Fig.2 system structure
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