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Hitachi CML190SXWB 19-inch TFT Display Review

Hitachi CML190SXWB 19-inch TFT Display Review - PCSTATS
Abstract: Among the amenities we find a side mounted cable connection causeway for easy access, a swivel base, and support for both analog and digital DVI display signals.
 86% Rating:   
Filed under: Monitors Published:  Author: 
External Mfg. Website: Hitachi Sep 24 2002   Max Page  
Home > Reviews > Monitors > Hitachi CML190SXWB

OSD and Display Evaluation Notes

The on screen display is something that we as users generally only interact with when something is awry, or when we are first setting up the display. In those instances the last thing anyone wants is to see is an amazingly complex menu system which is difficult to move through and adjust.

With the CML190SXWB, Hitachi use an on screen menu that looks a bit more descriptive, and flows a bit better then run of the mill OSD's. It's good to see manufactures invest the time in continually upgrading the different segments of a display so that the end user has an easier time figuring things out.

The following controls are available on the menus; Auto adjust, input select, brightness, contrast, H/V position, sharpness, OSD transparency, clock, phase, RGB color adjust at user temp, color temp (6500, 7500, 9300, user) zoom, pan H/V, OSD position H/V, graph/text modes, recall and language select. On-screen display.

As with all LCD displays it is simply much easier to hit the auto adjust feature and let the display configure itself properly. This only applies to an Analog connection. When the display is connected to the computer via the DVI cable the signal is automatically calibrated and the only adjustments remaining are really only brightness and contrast.

PCstats TFT Display Evaluation Criteria:

We evaluate the quality of TFT displays with the help of a program called Nokia Monitor Test. The software application displays a range of colours and test patterns that can help diagnose just about any visual problems or defects a TFT display may contain.

It can also be a very useful tool for properly adjusting a display to the optimal settings. The software consists of eleven tests which can be run in steps as adjustments are made to the OSD. As the tests are run we look for the following problems, only one of which should be inoperable (broken pixel).

  • Broken Pixels: What we class as a 'broken pixel' can fall under any one of the following circumstances: Pixel always on (any colour), pixel always off, pixel unable to display a shade (red, green, blue, black, white), pixel shown colour gradient.
  • Pixel Clock: If the number of dot clocks within one horizontal synch are not properly configured the screen will appear to drift or vertical stripes may be generated. This should be correctable by the on screen menu.
  • Phase: If the phase of the display data and dot clock are not correctly tuned the screen can flicker, or text be displayed blurry. For example text may appear dithered, or when looking at a test pattern of a one-pixel black, one-pixel white checkerboard pattern the pattern may be distorted. This should be correctable by the on screen menu.
  • Response Time: We look for any streaking associated with moving a full page of text up or down quickly. Displays with slower refresh rates tend to show some degree of image streaking or text discoloration which can be distracting.
  • Stand Stability: TFT displays are fragile components and the stand should offer adequately stable support as well as be easily adjustable.

    We deduct marks for quality control if there are any predominant broken pixels in a display. While many manufacturers may consider a few broken pixels acceptable, we believe the high cost of TFT displays should translate into a clear and unblemished image.

  • Display Test System Configuration:
    Video Card: ATI Radeon 8500
    Operating System: MS Windows XP
    Display Settings: Color Temp: 6500 Kelvin
    Resolution: 1280x1024 pixels
    Frequency: 60Hz
    Colour: 32 Bit

    LCD Display Test Test Notes and Observations
    Geometry:

    LCD's inherent design means that test grids are displayed very true and very square. In this sense, LCD displays are really good for CAD work as the line render nice and sharp at their native resolutions. The Hitachi CML190SXWB was tested with a grid pattern as we do all LCD displays, but to measure grid representation (it should be composed of true squares) we broke out the ruler and measured. The grid squares measured 11.5mm x 12.5mm at 1280x1024 which is just about right on.

    Brightness and Contrast:

    Good shading on the grey scale, but 1% and 2% black were hard to discern from one another. White scales looked really good at an 80% brightness setting.

    Colour:

    The white, red, green and blue test screens were very bright and consistent over the entire screen area. There were no visible broken or damaged pixels or uneven areas along the edges as can sometimes occur on LCD panels.

    Convergence:

    The grid test patterns in RGB illustrate the worst case situations when different coloured pixels must work closely together, and since they comprise different parts of a pixel they do not line up exactly. CRT displays tend to produce better results under this test as there is more of a blending effect seen by then naked eye.

    Focus:

    All patterns displayed clearly and defined in both the horizontal and vertical axis. With such a high contrast ratio the lines are easily distinguishable even though they are separated by just one pixel lines.

    Resolution:

    Resolution was excellent at the native 1280x1024 resolution. The image scaling algorithm was acceptable but not as nice as running it under native screen settings.

    Moire:

    On the one-pixel vertical line test under an analog connection there was some background noise visible (just imaging very subtle waves in intensity) as was also the case on the one-pixel square test screen. The one-pixel horizontal screens displayed perfectly, as did the two grey tone test screens. When tested with the DVI digital connection the test screens were all displayed perfectly, with absolutely no noise or background waviness.

    Other Evaluation Notes:

    The stand swivels left and right very nicely and the tilt mechanism is easy to work with. Overall, this is a good business class display without the useless inclusion of tiny underpowered speakers or other "added value" parts which offer no real value to the user. The build and feel of the unit is very nice.

    < Previous Page © 2017 PCSTATS.com Next Page >

     

    Contents of Article: Hitachi CML190SXWB
     Pg 1.  Hitachi CML190SXWB 19-inch TFT Display Review
     Pg 2.  Simple lines and a nice swivel
     Pg 3.  — OSD and Display Evaluation Notes
     Pg 4.  Final Evaluation Notes & Conclusions

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