Plug Black Technology:
LCD Insertion black technologies BenQ Pioneered.
Black insertion technology and BenQ Film Similarly, in the adjacent two or within a few frames into a black frame to achieve the effect of increasing the total number of frames, so that the picture had a smear became clear.
Plug black technology really well, but it requires a response time of liquid crystal displays fast enough. Insert the black response time to achieve the bottom line is almost gray 8ms, over this time, then plug the black frame is very easy to detect the human eye. Therefore, the interpolation technique is gray black on the basis of the corresponding time, which is also before the LCD is not the reason to adopt the technology.
In fact, the inserted black liquid crystal display technology in the realization of two methods described above in addition to a full frame into a black screen, can also rely on Lamp Non-stop flashing to be inserted black. Although the lamp flashing method is feasible, but it demands a very high lamp. Long life and can not, Besides, it also increased the corresponding control circuit, costs go up,
BenQ has to implement this idea in the BFI (BlackFrameInsertion) plug black technology. Black LCD technology with a plug in the output screen black frame inserted between the extra to follow the example of the effect of the traditional CRT.
First, select the image in the display, insert the black frame and not the backlight off. This high-speed TN Panel Effective, but the MVA and PVA panel is constantly turning black too slow. The current high-speed TN panel for switching the black in just a few milliseconds of time, but even the best of the VA panel should take 10 milliseconds. Therefore, VA panel black frame insertion time than from one switch to another time frame is longer, BFI insert black technology is not applicable. Moreover, not only the regeneration of the frame (the standard LCD refresh rate is 60Hz, which is 16.7 ms), our eyes can not accept such a long time black frame. If the black frame duration is too long, the display will be like the 60Hz refresh rate CRT Monitors As blinking. I do not think people will like it.
The way, some evaluation that BFI double the frame rate using interpolation, it is not entirely correct. Panel's own frequency with black frame insertion to improve, but the frame rate remains unchanged. From Graphics Point of view, there is no any change.
So when the 24-inch BenQ launched FP241WZ PVA panel display, the switch to an alternative technology to achieve the same purpose: the black frame is not inserted into the liquid crystal Matrix , But the backlight. That is, at the appropriate time switch off the backlight.
Achieved in this way the black plug from panel impact response time, so both apply to TN panels, but also to other types of panels. To FP241WZ example, the panel behind the 16 independent control of the backlight lamp. In every moment, 16 of the 15 backlight is bright, the other in a semi-closed state, mimicking the effect in front of CRT monitors, only CRT monitor is a bright band from top to bottom movement, and BenQ LCD is a black belt in the sport from top to bottom.
Why did you choose this way instead of just light a lamp (so you can actually simulate a CRT display), or each time Switch All tubes then? Modern LCD monitors work in 60Hz refresh rate, it will be entirely produced by the practice of CRT screen flashing, narrow black belt with the monitor refresh rate synchronization (where the lamp before the show closed before the one, after re-lit display The new frame) This part of the solution said before the phenomenon of visual residue, while not produce perceptible flicker.
Backlight control method that will display a certain extent, reduce the maximum brightness, but the current crop of LCD display is not bright enough to pose a problem