LG L1715S came as a replacement to the above-described L1710S. The framing surrounding the screen has grown thicker, but the new small base makes the monitor look less bulky. I should acknowledge that this base is much handier than the old one, but with the same limited functionality; it only allows changing the tilt of the screen. As all “S”-marked models, this one is equipped with an analog input only.
The menu is absolutely identical to that of L1710S. We’ve got the LightView mode with six ready presets (three for day and three for night) plus a user-defined one. The Text mode corresponds to a color temperature of 9300K – we saw this by L1710S, too.
The viewing angles are good enough, but not faultless. When you look at the screen from aside, at an angle of 50 degrees or more, the image becomes slightly yellowish; when viewed from above or below, the onscreen picture becomes dark. Anyway, the angles are not as narrow as to cause any discomfort. The color reproduction goes without criticisms, as the monitor was just excellent at displaying both: photographs and simple color gradients.
The default values of the brightness and contrast are 100%; to make the screen shine with a luminosity of 100nit, I dropped the controls to 60% brightness and 80% contrast. The screen brightness in this monitor is regulated by modulation of the backlight lamp power, but the modulation frequency is quite high, about 540Hz.
Three available variants of the color temperature are selectable in the menu: “6500K” (it’s in fact 5940K for white and 8300K for gray), “9300K” (corresponds to 6750K white and 13780K gray), and the user-defined one. The difference between the temperatures of white and gray suggests that we will have an intensive level of blue.
Well, yes. Blue is too high in the middle of the range. Moreover, there is more than enough red in the light tones stretch of the dynamic range, which additionally cools down the white color.
At 100nit screen brightness, it is better with red in light tones, but overall, my remarks concerning the color reproduction setup remain the same.
As I have said earlier, LG specifies one and the same response time for all its LCD monitors as 16msec (see the LG website). When working with L1715S, I never doubted the claimed specification. Much to my surprise, the measurements gave out 32msec for a black-to-white transition! So, why don’t you feel that the monitor has a slow matrix? Just take a look at the graph with black-gray transitions and compare it to the one of L1710S:
Well, there is a divergence, but it’s smaller than between L1710B and L1710S models I have discussed earlier. It fits into the measuring error (1msec) across the biggest part of the range. Thus, we’ve got another proof that the response time as measured on black-to-white pixel conversions cannot comprehensively describe the speed characteristics of a matrix. This time the response time is twice as different, while most of the black-gray transitions take the same milliseconds to be performed.
The brightness and contrast ratio of this matrix are close to those of the above-mentioned monitors: the brightness complies with the specified 250nit, while the contrast ratio is a little worse than 200:1.
This LCD monitor model is a compromise between good viewing angles and response time. On the one hand, it does have broader viewing angles compared to L1710S, but it also has worse response time. The newer model, L1715S, with its new compact design, undoubtedly deserves thorough consideration as the response time of the two monitors performing black-gray transitions is nearly the same.