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Screen comparative test : CRT vs LCD
by Vincent Alzieu
Published on August 24, 2004

Brightness, color, contrast
The contrast ratio and brightness are two data measured according to the ISO norm. Please read this article to understand how we disagree with this norm: absurd data, faulty results, etc. ISO is apparently working on a new version of this norm. We hope that it will be release soon!

BenQ FP767-12
To stand out on real or on-line demonstration areas, flat screen are usually displaying excessive brightness. For your comfort, flat screen brightness should never reach over 110 cd/m². Influenced by the ISO norm and the resellers, the manufacturers commonly announce twice more, 220 cd/m², based on non representative measurements. Sometimes screens even have brightness over 300 cd/m². Such parameters are unnecessary and dangerous. Pushing the neon brightness to their limits reduce their life and the life of your monitor. Your eyes tiredness is also connected to your screen brightness. The brighter it is the faster your eyes get tired. So even if with LCD screens we don’t have to recompose the picture provided by a CRT screen, being exposed to a permanent dazzling light strains our eyes.

6500 K color temperature test



Interpreting the graph
X axis: 0 black to 100 white
Only the red curve, Delta E is of interest. Delta E is a measure of the gap between the desired color and the one measured by our colorimeter.
If Delta > 3, the desired color is noticeably different from the color displayed.
As soon as the Delta E is inferior to 3, even graphic designers agree that results are accurate.
There is, however, still a slight difference between the requested color and the color displayed.
If Delta is between 1 and 2, most of the users won´t notice a difference between the desired and displayed color.
Eye sensitivity is when Delta E =1. Below this value, the result is perfect.

The BenQ screen has better results than the average LCD screen. Standard brightness is “only” 165 cd/m², this result is completely acceptable. With the sRGB mode, recommended for multiple use on a computer (games, office software, Web…), the FP767-12 has excellent results. 90% of the colors displayed are accurate, 96% are very good (DeltaE < 2), and 91% are perfect. This very is better than most of the LCD screens. Unlike common ideas on LCD screens, not expensive screens for picture editing exist.

5000 K color temperature test
If most of the users adjusts their screens to 6500K, graphic designers use the 5000K color temperature. This color temperature is clearly more difficult to display.



Once more, the FP767-12 has excellent results. Knowing that even the graphic designers rarely calibrate their screens, this screen with the right settings could be used for professional picture editing. However the result is still far from being perfect.

Mitsubishi Diamond Pro 930SB
6500 K color temperature test



Mitsubishi straight things up with this test. To get real colors, CRT screens are still the bests. The quality and accuracy are impressive. With this screen the black is really black. The best black reached is 0.07 cd/m² instead of 0.2 cd/m² for the LCD.

With sRGB parameters, used for this test, some settings like brightness and contrast are not accessible. We have to use standard parameters. And there is actually a lack of brightness. The 930SB white at 79 cd/m² is a little bit weak. A better result would be 90 cd/m².

5000 K color temperature test



The result is even more impressive at 5000K. Any colors from white to black are accurately displayed. The “top of the line” CRT reputation is verified. These screens are the only one to reach to the graphic designers requirements.

CRT screens are the bests for color quality.

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