REVIEW: LG Flatron W2363V Part 7
The possible color levels from 0 to 255 are differentiated from 8 to 240 for red, blue and green equally. With the factory default K70 all three color gradients show slight banding patterns. The optimized setting K50 lowers the banding but cannot eliminate it entirely.
A background uniformly colored in very bright green or blue appears much whiter than it should do. Moreover, the representation of the lowest and highest color levels heavily depends on the viewing angle giving an extremely uneven impression.
During the test we found that the best perspective is considered to be at about 5 degrees to the top. An optimal viewing position may not actually be found, since the image impression changes with even small movements in all directions.
One weakness of TN technology is the black point. With 0,26 cd/m² in the factory settings (H100 / K70), the W2363V achieves a good result. The high maximum luminance results in a very good static contrast value of more than 1.100:1. Since the black level also depends almost linearly on the brightness setting, the contrast with the optimized setting K50 still reaches an outstanding value of about 1.100:1 over a very wide range of luminance.
The data sheet of the W2363V indicates a maximum luminance of 300 cd/m². At factory settings (H100 / K70), we measured 291 cd/m² in the center of the screen. With reduced contrast (K50), the luminance lowered to 245 cd/m². Thus, the actual light density depends on both the brightness and the contrast control.
A suitable workspace luminance of 140 cd/m² arises with the settings H37 / K70 resp. H47 / K50. With the brightness control set to zero, we measured a minimum luminance of 48 resp. 42 cd/m².This gives a large regulation range which amounts to 249 cd/m². The lower value can hardly be used in practice. The upper value is more than sufficient for PC usage and also satisfactory for viewing films in daylit rooms.
The measurements also revealed that the W2363V responds to changes in the brightness control with a very noticeable delay. It takes up to two minutes to achieve a stable luminance level. Here, a contrast control might be working in the background even with Auto Bright disabled in the OSD.
The uniformity of the background illumination was checked at 15 measuring points. The initial luminance of 140 cd/m² was set in the middle of the display.
Measured luminance of the W2363V.
We measured an average luminance of only 126 cd/m². The maximum deviation from the center is 26 percent down to 3 percent up. Only the center of the panel reaches the desired level, the brightness decreases rapidly towards the edges. The entire left hand third of the screen is lacking considerably in luminance.
The uneven luminance to the left is also visible to the naked eye. This result is below average even for a cheap TN panel.
The data sheet indicates a viewing angle of 170 degrees horizontally and 160 degrees vertically at a contrast ratio of at least 10:1. In reality, these values of TN panels are only achieved if drastic color distortions are accepted.
Horizontal and vertical viewing angles.
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