Articles: Monitors
 

Bookmark and Share

(0) 
Pages: [ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 ]

There’s nothing extraordinary about the settings: brightness, contrast, color temperature, etc. You cannot disable interpolation – the monitor always stretches the picture out to its native resolution.

The monitor’s brightness and contrast are set at 75% by default. I achieved a 100nit white by selecting 60% brightness and 61% contrast.

The brightness is regulated by backlight modulation, but this modulation looks odd. If the brightness setting is lower than 60%, the main modulation frequency (320Hz) adds up with peaks at 60Hz (the oscillogram above is recorded by a photo-sensor attached to the screen – it shows two such peaks quite clearly). As a result, the flickering of the screen is visible to and strains the eyes.

I can only make guesses as to the cause of such an annoying effect but it must be due to some defect in the monitor’s hardware. The circuit that regulates the brightness of the lamps is somehow affected by the impulses that drive the monitor’s refresh rate (which is 60Hz). I tested a revision A00 sample and the problem will hopefully be solved in newer revisions.

The color gamut is typical for monitors with ordinary backlight lamps. It differs but little from the standard sRGB space, being slightly superior in greens, coinciding in blues, and inferior in reds.

 

The brightness uniformity on black amounts to 5.6% on average and 16.2% at the maximum. For white, these numbers are 4.5% and 14.7%, respectively. The results are quite good and the E207WFP is superior to many other monitors in this respect. The pictures above show that this irregularity mostly shows up as a slight darkening of the right and left sides of the screen on both white and black backgrounds.

The gamma curves are perfect, lying in a group and almost coinciding with the theoretical curve.

The shape of the curves doesn’t worsen at the reduced brightness and contrast except for a bend of the blue curve in the bottom left of the diagram. And it is probably due to the insufficient accuracy of my calibrator on darkest halftones.

Like other monitors without RTC – most of the models in this review – the E207WFP cannot boast a fast matrix. The response average is 13.0 milliseconds GtG.

The quality of color reproduction setup is acceptable. Although the difference between the different levels of gray is higher than 1000K even in the Normal mode, the table shows that the biggest deflection is on dark-gray, which is the least conspicuous.

The monitor’s brightness is average while the contrast ratio is above 500:1 in one mode, which is quite impressive for a TN matrix.

The sections about the previous models ended with a test of predefined modes (Acer Empowering Technology, ASUS Splendid, etc), but no such modes are available on the E207WFP. If you want to change the brightness or contrast much (for example, when switching from an office application to a game and back again), you have to go into the onscreen menu and select their levels manually. That’s not quite handy, of course.

So, the Dell E207WFP is just a regular modern 20” monitor with a TN matrix. It is no different from other products of its class.

Highs:

  • Appealing exterior design
  • Accurate color reproduction setup
  • Uniform backlight

Lows:

  • Slow matrix
  • Flickering of the screen at a brightness level below 60%
  • No factory-set modes

Recommended usage:

  • Text-based applications (documents, spreadsheets, Internet)
  • Viewing and simple editing of photographs
  • Movies and games that don’t require a fast matrix
     
 
Pages: [ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 ]

Discussion

Comments currently: 0

Add your Comment