Otherwise, the monitor’s menu is analogous to the above-described L1730S. By default, the brightness setting stands on 100%, and the contrast on 70%. For the second test mode (100-nit screen brightness) I reduced the brightness control to 50% and the contrast control to 52%. The brightness of this monitor is controlled by power modulation of the backlight lamps at a frequency of about 275Hz.
It seems like the menu allows smoothly adjusting the color temperature, but that’s not exactly so – the slider has only five positions, two of which are marked as “6500K” and “9300K”. At the leftmost position of the slider, the real color temperatures of white and of 50% gray are 5200K and 5450K (this position could be formally labeled as “5400”). At the “6500K” position, the real temperatures are 5900K white and 6440K gray; one position to the right – 6430K and 7000K. One more position to the right – 7500K and 8050K. At the “9300K” position, the temperatures are 8180K white and 8790K gray. As you see, the balance of white and gray colors is set up in this monitor not ideally, but quite accurately – although the temperature of white is somewhat lowered, there are no great deviations in temperatures of different color tones. Visually, the color reproduction is very accurate, without noticeable flaws.
The exponent of gamma compensation can also be adjusted in the menu – in a small range to either side of the standard 2.2 value.
The color curves confirm my color temperature measurements – they look neat and don’t differ much between the colors. Besides, the monitor accurately reproduces the entire brightness range, without “slumping” darks or lights. You don’t lose any of dark colors even if the brightness and contrast settings are reduced to 50%.
Despite the declared response time of 12 milliseconds, the Flatron L1730B also turns to have a 16ms matrix that behaves much alike to the one in the L1730S. The “black-gray” response time is somewhat smaller than with the L1730S, but the difference lies in the measurement error range.
Other parameters of the Flatron L1730B are also similar to the L1730S: the contrast ratio is about 200:1, and the maximum brightness is close to 250 nits.
Thus, the Flatron L1730B is in fact an improved version of the L1730S – with a digital input, the option of screen height adjustment and the new f-Engine processor. This model is going to make a good home monitor for surfing the Web and watching movies.