Overview and Specifications — ASUS VG236H 23-inch 3D Display Review: 120Hz is the Future
by Brian Klugon August 7, 2010 2:48 AM EST
- Posted in
- Displays
- LCD
- 3D Vision
- 120Hz
121 Comments
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121 Comments
IntroductionOverview and SpecificationsImpressions and Subjective AnalysisControls, OSD, and Viewing AnglesNVIDIA 3D Vision — Part 1NVIDIA 3D Vision — Part 2Analysis: Color QualityAnalysis: Color UniformityAnalysis: Brightness and ContrastAnalysis: Brightness UniformityAnalysis: Processing and Input LagAnalysis: Power ConsumptionConclusions and Last Thoughts
Overview and Specifications
First off, let’s get the name down for this 23 inch, 120Hz display, because ASUS is selling the VG236 in two different packages and model numbers. One is the VG236H, which comes with a NVIDIA 3D Vision Kit and retails for $499. The other is the VG246HE, which is the exact same display, but comes without a bundled NVIDIA 3D Vision Kit and retails for $349. Both of those packages contain the exact same display, but just differ in whether they include the shutter glasses you’ll need to do stereoscopic 3D.
ASUS is basically selling you the 3D Vision Kit for $150, which is a pretty sweet deal. As of this writing, the same NVIDIA 3D Vision Kit is retailing on Newegg for $174.
The VG236H packs HDMI, DVI-D, and component video inputs, though the only one that will work with 120Hz refresh rates, and thus 3D, is DVI-D.
HDMI, DVI-D (120Hz and NVIDIA 3D), and Component Video
The VG236H display is glossy, as is nearly all of the bezel. ASUS claims to have added an antireflection coating to the display, as they well should. It no doubt mitigates the reflection a bit, but there’s still going to be unavoidable glare, especially if you have lights behind you.
That might be killer for some, but it isn’t a huge issue — I still wish it was matte though. The VG236H is also a TN panel, partly out of necessity to drive that super fast refresh rate, however color quality is actually pretty good as we’ll show in a minute. ASUS is using a technology called Dual Side driving to get to 120Hz.
Hate it or love it, the VG236H is also 16:9, and thus native 1920×1080. Finding 16:10 1920×1200 monitors which used to be the norm, not the exception, is increasingly difficult. Honestly, I’d rather have my extra 120 pixels of image height when hunting down people in games than deal with two black bars when playing back anamorphic video content. Oh well, 1080P is more marketable I guess.
Let’s go into the rest of the specifications:
| ASUS VG236H — Specifications | |||
| Property | Quoted Specification | ||
| Video Inputs | DVI-D (120 Hz 3D), HDMI, Component YPbPr | ||
| Panel Type | TN (with Dual Side driving), CCFL backlight | ||
| Pixel Pitch |
0. 265 mm |
||
| Colors | 16.7 Million (24 bit) | ||
| Brightness | 400 nits maximum | ||
| Contrast Ratio | 1,000:1 (standard), or 100,000:1 (dynamic) | ||
| Response Time | 2ms (g2g) with Overdive/»Trace Free» control | ||
| Viewable Size | 23″ (54.8 cm) diagonal | ||
| Resolution | 1920×1080 at 120Hz (1080P) | ||
| Viewing Angle | 170 degrees horizontal, 160 degrees vertical | ||
| Power Consumption (operation) | <60 watts typical | ||
| Power Consumption (standby) | <2 watts typical | ||
| Screen Treatment | Glossy (with antireflection coating) | ||
| Height-Adjustable | Yes: ~4″ (100 mm) of travel | ||
| Tilt | Yes: -5 degrees to 15 degrees | ||
| Pivot | No | ||
| Swivel | Yes: +/- 150 degrees | ||
| VESA Wall Mounting | Yes — 100x100mm | ||
| Dimensions w/ Base (WxHxD) |
21. 7″ (550 mm) x 16.5″ (420 mm) x 9.8″ (250 mm) |
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| Weight w/o Stand | 15.4 lbs (7.0 kg) | ||
| Additional Features | NVIDIA 3D Vision Kit, 120 Hz operation | ||
| Limited Warranty | 3 years — repair or replacement | ||
| Accessories | DVI-D cable, power cable, quick start guide, manual, warranty card, support CD, NVIDIA 3D Demo DVD, NVIDIA 3D vision kit | ||
| Price |
VG236H (includes 3D vision kit): $499 VG236HE (w/o 3D kit): $349 |
||
ASUS definitely understands its gamer segment, as including component and HDMI video inputs is definitely an added plus for people who want to hook up a game console or two. Of course, the caveat with HDMI on a display like this is that there’s no audio out for connecting headsets, something which would definitely put this over the top for most gamers.
We could get upset about DisplayPort being absent, but honestly it isn’t that big of a deal, yet.
Introduction
Impressions and Subjective Analysis
IntroductionOverview and SpecificationsImpressions and Subjective AnalysisControls, OSD, and Viewing AnglesNVIDIA 3D Vision — Part 1NVIDIA 3D Vision — Part 2Analysis: Color QualityAnalysis: Color UniformityAnalysis: Brightness and ContrastAnalysis: Brightness UniformityAnalysis: Processing and Input LagAnalysis: Power ConsumptionConclusions and Last Thoughts
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Asus VG236H review: Asus VG236H
The Asus VG236H is a 23-inch monitor with a 120Hz refresh rate and is compatible with the Nvidia 3D Vision Kit. The monitor includes a host of ergonomic adjustment options as well as HDMI and DVI connections. At $340 (without the 3D Vision kit; $500 with it), the Asus is not a terribly expensive investment prospect for a monitor, especially with the features it includes.
However, if you spend $30 less, you can get the Samsung PX2370, which is a better performing monitor with some really useful onscreen display options. A green tint problem hampers the VG236H. While you can make adjustments to marginalize the issue, it takes effort to do so, and even then, the monitor’s performance isn’t perfect. If ergo options as well as 120Hz refresh rate are important to you, the VG236H should fit your needs nicely and at a price most people can live with.
Design and features
The 23-inch Asus VG236H has an extremely glossy, reflective piano black front chassis with a plain matte covering the back. The monitor’s screen is also very glossy with mirrorlike reflectance. The monitor includes a typical-looking circular foot stand, which is 9.75 inches in diameter. While the stand provides the monitor with adequate stability, if you knock the monitor, the stand makes a loud clicking sound as the plastic and metal on its bottom grind together.
The monitor includes a five-degree back tilt, panel swiveling, and height adjustment; however, it doesn’t have a pivot adjustment.
The stand leaves 2.6 inches from the bottom of the bezel to the desktop when adjusted to its lowest height and 6.8-inches when at its highest position. The bezel is 0.75 inch wide and the panel is 1.25 inch deep at its most narrow and 2.5 inches at its thickest, when you take the monitor’s ventilation system and connecting options into account.
The VG236H has HDMI, DVI, and component connection options. Asus locates the connections on the back of the display, on the right side, facing downward. The capability to adjust the height of the panel makes them fairly easy to access. The monitor’s onscreen display button array includes five buttons in the lower right-hand corner of the bezel. Each button is suitably wide and provides a tactile click when pushed.
The array consists of a Menu button, an Up and Down button, a Source button, and a preset cycle button. The monitor’s Up and Down buttons also doubles as the Brightness and Contrast shortcuts. Navigating the OSD is simple, although it took us a few minutes to get accustom to using Menu as the «Enter» button.
The VG236H’s preset modes include Standard, Theater, Game, Night View, and Scenery. Each preset changes the color temperature and brightness of the display with the intent of them being appropriate to the task at hand. Its additional color preset options include Cool, Normal, Warm, SRGB, and User Mode; the latter letting you change the RGB values individually. Finally, the «Skin Tone» option includes a Reddish, Bluish, and Normal setting.
Design highlights:
Connectivity: HDMI, DVI, Component
Ergonomic options: 5 degree back tilt, Screen height adjustment, Swivel
Resolution: 1,920×1,080 pixels
Aspect ratio: 16:9
Audio: n/a
VESA support: Yes
Feature highlights:
Included video cables? DVI
Backlight: CCFL
Panel Type: TN
Screen film: Glossy
Pixel-response rate: 2ms
Number of presets: 5
Overdrive: No
Picture options: Brightness, Contrast, Sharpness, and Saturation
Color controls: Cool, Normal, Warm, sRGB, Reddish, Bluish
Gamma control: No
Additional features: 120Hz refresh rate and Nvidia 3D Vision compatible
Performance
Editors’ note: As our test system does not include an Nvidia GPU, we did not test the monitor with the 3D Vision Kit.
For an earlier review of the Kit, check out its review.
We tested the Asus VG236H through its DVI input, connected to a Windows Vista PC. The display posted a composite score of 83 on CNET Labs’ DisplayMate-based performance tests, which is more than a few points lower than the Samsung PX2370’s score of 97. The VG236H’s most glaring problem is its color accuracy, particularly its propensity to coat the screen in a green tint. Depending on the preset used, the green tint diminished only slightly and could always be easily seen no matter which color temperature or skin tone setting used. However, by accessing the RGB values and adjusting the green to 85, we were able to diminish the amount of green tint onscreen to a point where it was not distracting. At that setting, the green was unobtrusive; however, you’ll have to adjust the red to about 94 to keep white from having a pinkish look.
In our Black Level test, the VG236H crushed very dark grays to the point that a level four gray—which is four levels above true black—was the darkest color the monitor could display other than true black.
This indicates the monitor has a higher than optimal black level. In the Dark Screen test, we saw very apparent clouding on the top and bottom edges of the screen, much more so than on the PX2370.
Text
With text, the monitor had no color problems displaying black text on a white background. We were able to see fonts clearly down to a 6.8-point size.
Movies
We tested the Asus VG236H using the Blu-ray version of «Avatar.» As in our DisplayMate tests, there was an apparent green tint problem in the Theater preset. The problem didn’t go away when switching to other presets; however, we were able to diminish the amount of green in the picture by adjusting the red and green values downward. Also, the monitor didn’t display dark details, such as braids in the hair of the Na’vi during a nighttime scene.
Games
Because of our intimate familiarity with World of Warcraft, it remains the best tool for us to use when judging color quality and vibrancy in games.
We found that the Game mode didn’t over saturate the colors and instead presented them in a fairly accurate manner, except of course for the dreaded green tint, which popped up here as well. We were able to diminish the effect by lowering the green and red values.
Photos
When viewing photos, the display had only a slight greenish hue, but otherwise we weren’t disappointed in photo display quality. Adjusting the monitor’s green levels downward improves things slightly, as does changing the Skin Tone function to «Reddish;» however, it was never as accurate as the Samsung PX2370 is.
Viewing Angle
The optimal viewing angle for a monitor is usually directly in front, about a quarter of the screen’s distance down from the top. At this angle, you’re viewing the colors as they were intended by the manufacturer. Most monitors are not made to be viewed at any other angle. Depending on its panel type, picture quality at nonoptimal angles varies. Most monitors use TN panels that get overly bright or overly dark in parts of the screen when viewed from nonoptimal angles.
The Asus VG236H uses a TN panel, and when it’s viewed from the sides, we perceived the screen to darken about 6 inches off from center; a typical viewing angle limit for a TN-based monitor. At default settings, the PX2370 had a typical viewing angle threshold; however, it includes extra features that improve viewing from specific angles. The Asus VG236H doesn’t include these features.
Recommended settings and use
During general use, watching movies, and playing games, we found the VG236H’s Standard Mode preset to be the optimal picture setting with the color temperature set to User and the Red to 94 and green to 85. When editing photos, you should set the monitor’s Skin Tone option to Reddish. This reduces the slight green tint, making faces in photos look more natural as a result.
As with most TN-based monitors, the Asus VG236H shouldn’t be used if accurate color reproduction is required; however, the monitor is good for watching movies, playing games, and for general use.
If you do have stringent color needs, we suggest you narrow your search to IPS or PVA-based panels only. The
| Asus VG236H | Average watts per hour |
| On (default luminance) | 43.34 |
| On (max luminance) | 43.34 |
| On (min luminance) | 21.52 |
| Sleep | 1.72 |
| Calibrated (200 cd/m2) | 32.03 |
| Annual power consumption cost | $14.12 |
| Score | Poor |
Power consumption
The Asus VG236H achieved poor power consumption, with a Default/On power draw of 43.34 watts, compared with the PX2370’s draw of 25.01 watts in the same test. The consumption delta was even higher in our Sleep/Standby test, with the PX2370 costing 0.27 watts and the Asus VG236H drawing over six times as much with 1.72 watts. With both monitors’ center points calibrated to 200 candelas per meter square, the PX2370 consumed 19.
9 watts, whereas the VG236H drew a high 32.03 watts. Based on our formula, the Asus VG236H costs $14.12 per year to power, compared with the PX2370’s $7.65 per year power consumption cost.
Brightness (in cd/m2)
(Longer bars indicate better performance)
Asus VG236H
355
Samsung SyncMaster XL2370
344
AOC V22 Verfino
256
Samsung SyncMaster PX2370
246
Asus MS238H
223
BenQ V2420H
207
LG Flatron E2350V
197
Contrast ratio
(Longer bars indicate better performance)
LG Flatron E2350V
1,355
Asus VG236H
1,017
Samsung SyncMaster XL2370
1,008
AOC V22 Verfino
952
Samsung SyncMaster PX2370
948
Asus MS238H
942
BenQ V2420H
929
DisplayMate tests
(Longer bars indicate better performance)
Samsung SyncMaster PX2370
97
Samsung SyncMaster XL2370
96
LG Flatron E2350V
94
AOC V22 Verfino
92
Asus MS238H
87
Asus VG236H
83
BenQ V2420H
83
Find out more about how we test LCD monitors.
Service and support
Asus backs the VG236H with a three-year casing and panel warranty that covers the backlight. Asus also offers support through a 24-7 toll-free number, e-mail, and Web chat. At the time of this review, Asus doesn’t have the VG236H’s documentation and support software available on its Web site.
ASUS VG236H LCD Monitor
We have already tested several monitors and DLP projectors that can display in stereoscopic mode and are officially compatible with the NVIDIA 3D Vision kit. The ASUS VG236H monitor also belongs to this group, but it stands out for at least one feature — it already comes with the NVIDIA 3D Vision set in the box, and you do not need to buy it additionally.
Contents
- Technical data, scope of delivery and price
- appearance
- Communication
- menu, localization and control
- Image
- Assessment of the quality of color rendering
- Measurement of the uniformity of black and white fields, brightness and energy consumption
- Determination of the response and delays of the conclusion
- Measurement in stereoscopic mode
- Terminals
Specifications, scope of supply and price
| Type of matrix | TN | |
| Diagonal | 58. 4 cm (23 inch) |
16: |
| Resolution | 1920 × 1080 pex | 0.265 mm |
| brightness | 400 kD/m² | |
| Contrast |
9. |
|
| Review angles | 170 ° (mountain) and 160 ° (vert.) Up to a contrast 10: 1 | |
| Result time | 2 ms from gray to gray | |
| The number of displayed colors | 16 7 million | |
| Interfaces |
|
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| Compatible video recording | 9001 DV20×1080@50/60/100/110/120Hz
|
|
| Acoustic system | LOT | |
| Features |
|
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| Dimensions (SKVXG) | 550. 2 × 419.5 × 250 mm |
|
| Supply voltage | 100-240 V, 50/60 Hz | |
| Average current price (number of offers) in Moscow retail — (ruble equivalent) in tooltip)
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Appearance
The body of the monitor and plastic parts of the stand are mainly made of black plastic with a matte surface, but there are also elements with a mirror-smooth surface — this is the frame around the screen, the top cover of the stand and the pad on the stand base. Mirror-smooth surfaces are not very scratch resistant.
The outer surface of the matrix is black, mirror-smooth, noticeably glaring.
In the lower right corner of the frame are the control buttons and the power button (rather stiff) and the status indicator (not very bright, glows blue during operation, orange in standby mode and does not light when the monitor is turned off).
The power connector and interface connectors are located on the back of the lower part of the body bulge and are oriented downwards. Connecting cables to the connectors is relatively convenient. In the corner on the back panel you can find a Kensington lock slot.
Telescopic stand, the spring balances the weight of the screen unit, so it is set at the desired height with a slight movement of the hand. In the compressed state, the stand is fixed with a wire pin, which makes it easier to transport the monitor and pack it. The top hinge of the stand allows the screen unit to be tilted slightly forward from vertical and more backwards.
The stand base is made up of two steel discs connected by a screw in the center and rotating through 300° relative to each other.
The upper disk is covered with a plastic overlay and a rack is screwed to it with a lamb screw. The lower disk is covered with black enamel and gaskets made of elastic material are glued to it. The base area of the stand is quite large, since it is flat, this area is not completely excluded from the working area of the table. The construction of the stand is quite rigid. The monitor is stable. If necessary, the stand can be detached from the screen unit and the freed threaded holes (at the corners of a square with a side of 100 mm) can be used for mounting to a VESA-compatible bracket.
Switching
The monitor is equipped with two digital inputs — DVI-D and HDMI, as well as analog component.
No VGA input. There are no built-in speakers. The DVI-D input supports HDCP (of course HDMI is also HDCP compliant) and is the only input that can be used in stereoscopic mode, as it accepts Full HD resolution (1920 by 1080 pixels) with frame rates up to 120Hz.
Menu, localization and control
Navigating through the menu is awkward. When adjusting the image, the menu remains on the screen, but the menu does not take up much space on the screen, so it does not interfere with the assessment of the changes being made.
If necessary, you can change the delay for automatic exit from the menu, the position of the menu on the screen and its transparency. When there is no menu on the screen, the first button (from left to right) switches profiles, the second one displays the slider with the setting Contrast , the fourth one with the setting Brightness , the fifth one iterates over the inputs. The inputs can also be selected from the menu. There is a Russian version of the on-screen menu. Cyrillic script is slightly uneven and clearly contains Latin letters. The quality of translation into Russian is not the highest.
Picture
Not very many settings.
Preset setting combinations are stored in several preset profiles that can be edited and reset to factory setting value combinations.
Some settings in some profiles and with digital connection methods are not available. When the ASCR mode is enabled, dynamic brightness control is enabled (brightness increases for bright scenes and decreases for dark scenes).
There are three modes of geometric transformation: Full screen — the image is stretched to full screen, pixel by pixel output in the center of the screen, 4: 3 — enlargement to the nearest screen borders while maintaining the original aspect ratio, OverScan — the same as Full screen , but the picture is also slightly enlarged, so it is cut off around the perimeter.
Interpolation of low resolutions to matrix resolution is performed without artifacts. In mode 1920 × 1080 with any connection method, stripes through one pixel are clearly distinguished, there are no artifacts, colored lines one pixel thick are displayed without loss of color clarity.
According to subjective sensations, the colors are correct and saturated. When the parameter Contrast is increased above 80, gradations in the highlights begin to disappear, when Brightness or Contrast decrease, the brightness decreases, but the number of distinguishable gradations practically does not change, while Brightness adjusts the brightness of the backlight, and Contrast changes the transmission of the LCD matrix. The white field is uniform, on the black field only narrow stripes at the top and bottom are slightly overexposed. All shades of colors are synthesized using dynamic color mixing (dithering).
Cinema modes have been tested using a Sony BDP-S300 Blu-ray player. Connection — component and HDMI. Blockage in the shadows does not go beyond the «safe» boundaries. All colors are different in light. Brightness clarity is very high and in the case of a Full HD signal is 1080 lines.
In this mode, selecting Full screen The picture is displayed 1:1 without any interpolation. The color clarity is slightly underestimated, perhaps due to errors in the restoration of color from the color difference representation method. The monitor accepts 576i/p, 480i/p, 720p, 1080i/p signals. With an HDMI connection and a 1080@24fps signal, the frames are the same length. In the case of interlaced signals, the monitor tries to compose a frame from the fields, which it does well for stationary objects (and even diagonal edges are smoothed out), but objects in motion are more often displayed in the fields. An exception is a signal with interleaved fields 2-3, which the monitor correctly converts to the original frames. Artifacts in the form of a «comb» are very rare. Normal resolution signals are processed by the monitor without taking into account the pixel ratio, so in 4:3 mode, the PAL picture in 4:3 format is slightly vertically stretched, and NTSC is compressed.
LCD matrix testing
Some of the matrix parameters we checked with our instruments. The methodology is described in detail here.
Color Quality Evaluation
To evaluate the rise in brightness on the gray scale, we measured the brightness of 256 shades of gray (from 0, 0, 0 to 255, 255, 255) for the sRGB and Custom color correction profiles. The graphs below show the increase (not an absolute value!) in brightness between adjacent halftones.
sRGB.
Custom.
In both cases, not all shades differ in brightness, but in general, the uniformity of the increase in brightness is preserved. Approximation of the obtained gamma curves gave an indicator of 2.23 and 2.50 , while the approximating exponential function slightly deviates from the real gamma curve:
sRGB.
Custom.
An X-Rite ColorMunki Design spectrophotometer and the Argyll CMS software package (1.1.1) were used to evaluate color quality. Color gamut close to sRGB:
Below is the spectrum for the white field (white line) superimposed on the spectra of the red, green and blue fields (lines of the corresponding colors).
This spectrum with several pronounced peaks is typical for monitors that use fluorescent backlights. The colors on the gray scale in the case of preset profiles were noticeably different from the standard white point, so we tried to manually correct the color reproduction by adjusting the gain of the three primary colors. The graphs below show the color temperature in different areas of the gray scale and the deviation from the black body spectrum (parameter ΔE), obtained when profile 9 was selected in the monitor settings0255 sRGB , for the original user profile and for it after correction.
Manual correction resulted in a reduction in the deviation of the white point, but did not eliminate the variation in the gray scale.
Measurement of black and white uniformity, brightness and power consumption
Measurements of the brightness of a small area of the screen in a given direction were carried out with a highly sensitive narrowly focused (4 ± 0.5 degrees) sensor. When measuring the uniformity of white and black fields, the sensor was sequentially placed at 25 points on the screen, spaced in increments of 1/6 of the width and height of the screen (screen borders not included). In this case, the sensor axis was directed strictly perpendicular to the screen surface. The contrast was calculated as the ratio of the brightness of the fields at the measured points.
The table shows the average values and the minimum and maximum deviations from the average values.
| Parameter | average | Deviation from the average | |
| min., % | max., % | ||
0. 31 KD/m² |
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| White field brightness | 304 cd/m² | −9.0 | 8.0 |
| Contrast | 994:1 | −11.6 | 5.7 |
Hardware measurements showed acceptable parameter uniformity and high contrast.
When the ASCR mode is enabled, the monitor will change the brightness of the backlight depending on the overall brightness of the image. He doesn’t do it very fast. The graph below shows how dynamic backlight brightness adjustment works when switching from black to white (lamp modulation is smoothed for clarity).
It can be seen that after switching to a white field, the brightness gradually increases and reaches a maximum in about 4.
5 s. With a black field in the entire screen, the brightness of the backlight decreases very much, but the backlight does not turn off completely.
The brightness of the white field in the center of the screen was determined using an Argus-02 brightness meter.
| Mode | Brightness, cd/m² | Power consumption, W | ||||||||||||||||||||||||||
| Brightness = 100 | 319 | 42.9 | ||||||||||||||||||||||||||
| brightness = 50 | 201 | 32.3 | ||||||||||||||||||||||||||
| brightness = 0 | 22.0 | 126 | 44.5 | |||||||||||||||||||||||||
| Waiting | — | 1.9 | ||||||||||||||||||||||||||
| Tailed | 0.8 | |||||||||||||||||||||||||||
e. without compromising image quality (contrast and the number of distinguishable gradations are preserved), the monitor’s brightness can be changed over a wide range, which allows you to comfortably work and watch movies both in a lighted and in a dark room . At low brightness, the flickering of the backlight lamps is not visible, due to the high modulation frequency — 248 Hz.
| Trace Free Value | Response Time | ||||||||||||||||||
| Black-White-Black | Total Average Between Semitones | ||||||||||||||||||
| 0 | 5. 8 ms (4.0 ms on + 1.8 ms off) |
21.2 ms + 1.9 ms off) | 10.6 ms | ||||||||||||||||
| 100 | 6.2 ms (4.3 ms on + 1.9 ms off) | 6.4 ms
Despite pronounced bursts of brightness at the fronts of some transitions, conspicuous artifacts are not visible even at maximum overclocking. Image output delay relative to CRT monitor was 21 ms for both DVI and HDMI connections. However, latency was measured at 60 Hz due to the CRT monitor used for comparison, which does not support 120 Hz frame rate at 1920 by 1080 pixels. Measuring viewing angles To find out how the screen brightness changes when deviated from the perpendicular to the screen, we took a series of measurements of the brightness of black, white and shades of gray in the center of the screen in a wide range of angles, deviating the axis of the sensor in three directions: vertical, horizontal and diagonal (in the direction from the center to the upper right corner of the screen (positive angles) and to the lower left corner (negative angles)).
Reducing of the brightness of the White Field by 50%:
We note a gradual decrease in brightness when deviating from the perpendicular to the screen in the horizontal direction, while the graphs do not intersect in the entire range of measured angles. When deviated downward, dark shades are inverted, when deviated upward, light shades converge in brightness, and the brightness of white becomes less than the brightness of light gray. With a deviation in the diagonal direction, the behavior of the brightness of the hues is intermediate between the vertical and horizontal directions; no inversion of the hues was observed. To quantitatively characterize the change in color reproduction when the gaze deviates from the perpendicular to the screen, we carried out colorimetric measurements for white, gray (127, 127, 127), red, green and blue fields in full. Since the properties of the TN-matrix are actually symmetrical about the vertical axis, to save time, the measurement of the color shift was performed only when deviated up, down and to the right. The measurements were carried out in the range of angles from 0° (the sensor is directed perpendicular to the screen) to 80° with a step of 5°. The obtained intensity values were recalculated into deviation ΔE relative to the measurement of each field at a perpendicular position of the sensor relative to the screen. The results are shown below: As a reference point, you can choose a deviation of 45°, which can be relevant if, for example, two people are viewing the image on the screen at the same time. Testing in stereoscopic modeTesting was carried out using the latest drivers for the video card and for 3D Vision. We watched test fragments of video and animated stereo films, stereo photographs and played a little with a simple toy. In general, the quality is good, even in the case of very contrasting objects, spurious contours and ghosting are not very pronounced. Below are photographs taken through the glass of glasses when a black square on a white background and a white square on a black background are displayed on the screen. In frames for different eyes, the squares are shifted, so with a division of 100%, only one square would be visible through the glass of the glasses. However, in both cases, faint shadows of the square for the second eye can be seen:
Eye separation is effective on almost the entire screen area, only a very narrow strip at the top was always overexposed. To measure brightness and temporal characteristics, we used a stereoscopic photo viewer to display a white frame for the left eye and a black frame for the right eye at a frequency of 60 Hz for each eye. The graph below shows what the brightness sensor registers without using glasses and through the left glass (the vertical scale is observed), and for comparison, a graph for a white field for both eyes is shown: Due to the fact that it takes a certain time to switch the monitor matrix, the brightness of the white frame is approximately 39% with the theoretically possible (if the response time was infinitely small) 50% of the non-flickering white field, plus the shutter glasses pass only a narrow time interval and also have some response time, as a result of which (and due to absorption on the «sandwich» of glass, polarizers and the LCD layer) the effective brightness is reduced to 6%. For this reason, it is best to watch stereo in complete darkness. Pinouts The monitor features an adjustable stand, rare for TN-matrix monitors, and, of course, 120Hz frame rate support and compatibility with the NVIDIA 3D Vision kit. DPCs:
Disadvantages:
Since the NVIDIA 3D Vision kit is included in the package, we believe that the ASUS VG236H monitor deserves the award for its unique packaging and original packaging. We would like to thank AMD for their help in setting up the test bench. Specifications of the ASUS VG236H monitor on the KNS websiteThe product is traceable. Jur. individuals and individual entrepreneurs need to connect to the EDF to make an order. Description Features general information Manufacturer Asus General characteristics Type LCD LCD matrix type TFT TN Size 23″ Maximum Resolution 1920×1080 3D Ready yes Horizontal dot pitch 0. Vertical dot pitch 0.265 mm Dynamic Contrast 100000:1 Brightness 400 cd/m2 Response time 2 ms View area horizontal: 170°; vertical: 160° Max number of colors 16.7 million Scan Sweep frequency horizontal: 24-140 kHz; vertical: 50-122 Hz Functions Multimedia no Subwoofer no Microphone no Interfaces DVI no DVI-I no DVI-D yes VGA (D-SUB) no HDMI yes S-video no S/PDIF no USB (video) no USB hub no display port no Mini Display Port no TV tuner no Composite video input no Component video input no Cart Reader no Nutrition
power unit Integrated Power consumption operating: 60 W. 
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Contrast within the range of ±82° only falls below 10:1 when tilted down by 70°. Among other monitors on TN-matrices, the viewing angles of this monitor are relatively large. 
The criterion for maintaining the correctness of colors can be considered the value of ΔE less than 3. It follows from the graphs that when viewed from an angle, the primary colors shift slightly, but the white point and grayscale change very much. 
We note the presence of three video inputs, support for HDCP and consumer video modes, that is, the monitor can be connected simultaneously to a computer, to a game console and to a consumer video player. According to the combination of characteristics, the monitor is suitable for typical office work, non-professional work with graphics, for watching movies and for playing games. 
265 mm 