Daewoo L700C & L520B: Value Oriented 17'' and 15'' LCD's
by Kristopher Kubicki on November 28, 2002 4:01 AM EST- Posted in
- Displays
Benchmark
For comparison purposes, we ran a combination of CheckScreen and DisplayMate on the Daewoo L700C 17” LCD and the Daewoo L520B 15” LCD against the previously reviewed Samsung 191T LCD. Below is a table with the tests performed and notes we made during testing. Our test machine is composed of an Inno3D GeForce4 4200 using the VGA 15 Pin D-sub, remember there is no DVI on these models.
We ran all of the tests at 1280x1024 pixels with a refresh rate of 60Hz for the L700C, and 1024x768 pixels with a refresh rate of 75Hz on the L520B. Before the final benchmark, we calibrated the monitor as per the instructions included with DisplayMate; any changes to the LCD during the initial calibration run are noted in the observations.
|
DisplayMate |
||
|
Test |
Monitor |
Observations |
|
Intensity range check |
L700C |
Pure, crisp |
|
L520B |
Reds corrected with OSD |
|
|
191T |
Looks good |
|
|
Black level adjustment |
L700C |
Not excessively bright, easy to adjust for black |
|
L520B |
Very good for an LCD, dark |
|
|
191T |
Blacks appear slightly lighter than on CRT |
|
|
Defocusing, blooming and halos check |
L700C |
Minor distortion |
|
L520B |
Minor distortion |
|
|
191T |
None |
|
|
Screen uniformity and color purity |
L700C |
Great |
|
L520B |
Uniform, no bright/dark spots |
|
|
191T |
Sharp, crisp, pure |
|
|
Dark screen |
L700C |
Only a small amount of glare |
|
L520B |
Less glare than the L700C |
|
|
191T |
Very little glare. Anti-reflective screen |
|
|
Primary colors |
L700C |
Red a little dull, common for LCD |
|
L520B |
Same slightly dull red, even after correction |
|
|
191T |
Looks good |
|
|
Color Scales |
L700C |
Red corrected with controls |
|
L520B |
Same problems with red |
|
|
191T |
Reds darken a little too fast |
|
|
16 intensity levels |
L700C |
Corrected with controls |
|
L520B |
Fairly accurate after first correction |
|
|
191T |
Looks good |
|
|
Pincushion/barrel distortion |
L700C |
Sharp |
|
L520B |
Very accurate |
|
|
191T |
Completely straight, no distortion |
|
|
Geometric Linearity |
L700C |
No warping, perfect grid |
|
L520B |
No warping |
|
|
191T |
Razor sharp grid, no curvature |
|
|
Horizontal color registration |
L700C |
Fairly straight |
|
L520B |
Very straight |
|
|
191T |
Slightly off on each color, expected due to RGB sub pixels |
|
|
Vertical color registration |
L700C |
Perfect |
|
L520B |
Perfect |
|
|
191T |
Completely level |
|
|
Fine line moiré pattern |
L700C |
Small amount of Moiré, might be streaking. |
|
L520B |
Small amount of distortion, might also be due to streaking |
|
|
191T |
Vertical Moiré, corrected slightly by controls |
|
|
Screen regulation |
L700C |
No problems |
|
L520B |
No problems |
|
|
191T |
No problems |
|
|
Streaking and ghosting |
L700C |
Ghosting apparent, but not excessive. |
|
L520B |
|
|
|
191T |
Intense streaking over grey (analog cable) |
|
For the most part, the quality of the LCD screen appeared to be very good, especially for value oriented monitors. A common trait we have begun to notice in LCD’s is the difficulties accurately replicating red. To most users, this is very hard to distinguish. However, graphic designers may have a particularly tough time getting the color settings to correctly generate perfect hues.
Generally, streaking on the L700C and the L520B was minimal. We mentioned before how we had a very difficult time with the streaking of the Samsung 191T over an analog connection. Both the L700C and the L520B generated much less streaking than the 191T. On the other hand, the 191T provided a DVI connection, so such streaking affects very few users. Even though the L700C and the L520B are value oriented monitors, DVI connections would have gone a very long way for these LCD’s.
As important as it is to see certain things in monitor construction, it is more important to not see others. We noticed light areas on the sides and dark areas along the top and bottom of the Albatron LCD we reviewed last month. This is typically due to the backlight of the LCD screen; a higher quality LCD has a uniform brightness over the entire screen. On the contrary, a lower quality LCD will have the backlight pitched on such and angle that the sides of the screen receive an unproportional amount of light. We were very pleased to see both Daewoo LCD’s had completely uniform brightness.
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