LG Flatron L1800P
This display belongs to quite another price sector than Iiyama’s products, selling for about $650. However, its functionality is not any worse than that of Iiyama AS4821DT. The display features two inputs – DVI and D-Sub (both cables are enclosed with the monitor) – as well as an integrated two-port USB hub. The case is compact, while the base allows you to rotate the screen in any direction. The tiling and height are adjustable; the portrait mode is also available. If necessary, you can remove the standard base to fasten a VESA-compatible so that you could mount the display on the wall.
The menu is quite usual for an LG product – rather handy, well done. It doesn’t offer you a plenty of settings, but still has everything necessary for work. The brightness and contrast settings are accessed by pressing one button, without entering the menu.
An “exclusive” feature of many LG displays is that the default brightness and contrast settings are already at maximum. As for our reference point of 100nit screen brightness, it is achieved by setting the contrast to 67% and the brightness to 60%. By the way, the brightness is controlled by pulse-width modulation of the backlight lamp with a frequency of 280Hz.
The color temperature is set up very well. At default settings, my measurements indicated 6410K on white and 6860K on gray. Calibration helps to improve these numbers to 6420K and 6790K, respectively, which is a trifle, really.
At default settings, the color curves fit well into the theoretical curve of 1.8 gamma, although the level of blue is too high, and the level of green – too low. Moreover, the display just cannot render the brightest tones of blue.
With the lower screen brightness, the blue color is still too high, but light tones are now rendered fully, although, without calibration the are displayed rather incorrectly. We have the dark tones of all three basic colors cut off. However, this range is rather narrow – 15% of the total.
Thus, I can call this color rendition quite appropriate.
The response time was 38ms when the screen brightness was at maximum. The reduction of the brightness setting didn’t affect this value as the brightness is regulated by the backlight lamp in this model. The reduction of the contrast led to higher response times: 42/21ms. Note also that the manufacturer specifies a response time of 50ms, which is obviously worse than the matrix can actually do.
Pixel rise time
Pixel fall time
The display showed a nice contrast ratio, too. Although the matrix is claimed to support 300:1 contrast ratio at 250nit screen brightness, it actually showed a contrast ratio of about 330:1 at 281nit brightness. When the brightness was reduced, I had the contrast ratio decreased to 150:1.
This display is a lucky combination of adequate price, functionality and effective characteristics. It has only one significant drawback: high response time. It means that L1800P can be considered an advanced office display, but won’t suit for work with dynamic images.