view angle lcd panel for sale

This monitor will display a 250:1 contrast ratio when viewed head on or at a 90° angle from the surface of the monitor. The contrast ratio will decline as you view the display from the side eventually going down to 10:1 or 5:1 contrast ratio at an angle of 70° from head on. As you move away from the maximum contrast at the straight on viewing position, the brightness of the white may increase or decrease and the black may increase or decrease. However, the contrast (ratio of the two) will decrease as you move away from normal viewing. Please note, this is just a general representation and not factual for every monitor with 140° viewing angle. All values are estimates.

Other factors such as the display"s brightness, ambient light and contrast conditions all play a part in the readability of the display. As mentioned above, viewing angle is defined using only the contrast ratio. However, even within this standard viewing angle, the colors or tones on the display panel may look different from the real color/tone, or they may become invisible, depending on the combination of displayed colors (background color, text color and switch color). For example, if the background color is bright and you look at the screen from below, the colors may appear inverted so that the text color and switch color darken to the point where they become invisible. Or, when the background color is dark and you look at the screen from above, the colors may again appear inverted, so that the text color and switch color brighten to the point that they become invisible. As a result, be sure to choose your screen colors carefully, so they produce an effective combination for the LCD panel"s operation environment.

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We also can provide total set such as lcd panel + touch +ad board +osd board + cables, quality promised. On price matters, we surely have the advantage as we have the direct source for original panels; -- Quality promised. Also Provide 12 months of warranty, you can return any fake panels and charges by us; -- Strict package.

The view direction is the right direction marked with Φ which is with respect to the X-axis. The original location is the center point of the display panel surface, the Z axis is Normal, the X-axis is Horizontal and Y-axis is Vertical.

Normally it was defined 4 angles to correspond with 3, 12, 9, and 6 o’clock respectively. So, you can find the 6 o’clock or 12 o’clock parameter in the LCD datasheet.

Viewing Angle is the angle with respect to the Z-axis in a certain direction and marked by θ (θU means upper View Angle). LCD Viewing Angle describes the maximum watching angle, and it is one of the key indicators with the display module.

The LCD bias angle is the angle perpendicular from which the display is best viewed. (See Fig.2) This angle is determined when the display is designed and can be set at any angle or orientation. The orientation of the bias angle of LCD displays is often stated with reference to a clock face. If the offset is above the display, it is referred to as a 12:00 or Top view.

The LCD viewing angle is the angle formed on either side of the bias angle, where the contrast of the display is still considered acceptable. Generally, this contrast is specified as 2:1 for monochrome LCD and 10:1 for color LCD.

For example, assume the display is a 12:00 (topview) type. When the display is viewed from 25 degrees above the vertical, it will be at its maximum contrast and best look. If the viewer moves their eyes further above the display by an additional 30 degrees, they will see a contrast reduction, but the display will still be readable. Moving the view position any further above the display will reduce the contrast to an unacceptable degree.

Adjusting the contrast voltage, VL, effects the Bias Angle to some extent, but not the Viewing Angle. A top view 12:00 display can be optimized for a bottom view 6:00 viewing position by adjusting the contrast voltage. A 12:00 display set for a 6:00 viewing position will not have as great a contrast as a 6:00 display set for 6:00 viewing position and vice versa.

Generally, displays are optimized for straight-on viewing. Either a 6:00 or 12:00 module may be used, and the contrast voltage can be adjusted slightly to optimize the display for that viewing position. In the above example, the viewing angles of both 6:00 and 12:00 modules actually overlap the perpendicular (or straight on) viewing position.

The LCD is positioned at the nominal viewing position and the pot is adjusted to obtain the desired LCD appearance. The voltage on the VL pin is now measured and a pair of resistors are chosen to produce this voltage in the production units.

By adjusting driving voltage and contrast is the most cost-effective way to improve the viewing angle. Different viewing angles need different driving voltage. It is compromising. In discussing the best viewing angle, we have to fix the voltage angle first.

– Positive LCD to Negative LCD (When the LCD is used indoor or dark environment, the contrast will increase a lot, but it will not display well with ambient light only, it is also more expensive)

When a LCD is high density with the segments/icons or very crowded, some customers also complains the viewing angle or contrast are not good. The reason is for crowded display, the layout can be long and thin. The voltage drop along the layout can be big. The solutions are:

Want to find out more about LCD, OLED & TFT solutions? – Check out our knowledge base, where ypu can find tips on electronics operating temperature and differences between LCD and TFT!

I was in a large computer store looking at computer LCD monitors and a lady was asking about which one was the better one to buy. A man (presumably her family) told her that the ones which indicated TFT (Thin Film Transistor) were the ones to buy. I then interjected that everything was TFT and it"s been that way since the extinction of those ugly STN passive matrix LCDs 8 years ago they use to sell with the cheaper laptops. Of course this invariably invited more questions as to which LCD was the better buy and better quality so I spent a few minutes showing them some of the shortcomings to many of these displays.

The first thing I noted was the poor viewing angle of every LCD on the display with the exception of a single model. To see this in effect, simply lower your head a few inches in front of the monitor and you will see the brightness of the entire display dim dramatically. Looking at the display from the bottom makes the image almost darken to the point of being black with some weird hues showing. Many of these displays don"t even look right when viewed at a slightly down angle since the color will change drastically. Case in point, look at the photos below of a typical LCD monitor which uses the most common TN (twisted nematic) technology.

What"s extremely frustrating is that the manufacturer claims that this display has a vertical viewing angle of 160 degrees. Yet the image above came from a photograph shot at 50 degrees above and below which indicates a 100 degrees spread. If we wanted to be extremely generous, we could say that the top-down view pictured bottom left is barely acceptable (it isn"t as far as I"m concerned), but the bottom-up view is flat out atrocious and there is no way in hell you can tell me that"s an acceptable image at this viewing angle.

In reality, the usable viewing angle of this display vertically is about positive 35 degrees to negative 10 degrees at best and that"s being generous. But looking at the vendor specifications, there is no way that you as the consumer would know this when you"re making the purchase. Now I don"t have a problem with the actual specs at the price they"re selling it at, but I do have a big problem with the deceptive advertising.

Only one of the LCD monitors out of about 30 models being shown on the show floor was viewable from all angles and it was most likely using PVA (Patterned Vertical Alignment) technology but it was about 30% more expensive than other displays of comparable size. It looked like something like the image below which is actually quite viewable at any angle. Furthermore, these displays typically offer true 8 bit per color or even 10 bits per color whereas the TN type displays are limited to 6 bits per color.

So the old adage that you get what you pay for holds true when it comes to LCD monitors, but manufacturers need to be honest with their customers. I purposely avoided singling out any single manufacturer because they all do the same thing, but this kind of deceptive advertising needs to stop.

Viewing angle is a very important factor when evaluating LCD display"s performance. Understanding how to locate the optimum viewing angle and choose the right LCD display will make your product looks sharp without extra cost.

LCD viewing angle is the maximum angle from which customer can view the screen well. "Viewing well" is commonly recognized as having at least 10:1 contrast and without grayscale inversion.

At time of manufacturing, LCD manufacturer designs LCD panel in a way that it is best viewed from an angle (called Bias) offset from the perpendicular by certain degrees, to accommodate as many applications as possible. Viewing angle is the angle covers both side of Bias angle, where the LCD is still "viewing well".

When reading an LCD"s specification, you will see the term "viewing direction". Viewing direction is defined following the format of a clock. Like figure below, Z axis is Normal, X axis is Horizontal and Y axis is Vertical. An LCD"s viewing angle "above" Z axis is having 12 o"clock viewing direction. So 6 o"clock viewing direction LCD is best viewed from "below" Z axis.

Theoretically, LCD manufacturer can produce LCD with 3, 12, 9 and 6 o"clock viewing direction. But in practice, we usually look at LCD display from 12 or 6 o"clock angle.

Using a simple TN type TFT LCD as example, its viewing angle is typically 45~65 degrees. Adding extra wide polarizer film (EWP) to the TN type LCD, the viewing angle may be increased about 10 degrees. Similarly, an O-film enhancement polarizer will widen the viewing angle to 75 degree in each direction. However, these enhancements bring along contrast reduction. Adjusting LCD contrast is necessary.

Using a liquid crystal display with proper viewing angle is very important to your product"s success. And we should keep in mind that optimized contrast is crucial, too. Both parameters define the visual appearance of the LCD display and the appeal of your product. Choices are based on cost performance trade offs.

For example, if your project requires a wide viewing angle 2.4" TFT LCD. TN TFT panel with O-film solution might be better than using IPS LCD. Topway engineers are here to help you making those design decisions.

If you usually watch TV alone from directly in front, you most likely don"t need a wide viewing angle. You should just turn the television to face you directly. However, if you watch TV with multiple people in a wide seating arrangement, you should benefit from wide viewing angles as those viewing off-center still see an accurate image.

Also, viewing angles have an effect if you sit very close, and in particular if you use the screen as a computer monitor. If you sit too close to the screen of a TV with narrow viewing angles, the edges of the screen might look darker and washed out. If it has wide viewing angles, however, the image remains accurate no matter where you sit.

There are a few competing TV technologies and panel types that each present their advantages and disadvantages regarding viewing angles. For LED-backlit LCD TVs, the LCD panel technology used is a big determining factor for how well a TV retains picture quality at an angle. There are two main types used in TVs: IPS and VA, and the differences between each panel type are noticeable; you can learn more about them here.

IPS panels are superior to VA panels when it comes to viewing angles. They"re generally recommended for wide seating arrangements because the image remains accurate when viewing from the side. On the other hand, the image on a VA panel quickly loses accuracy as you move off-center, and it can get pretty noticeable when sitting at a wide angle. This doesn"t mean IPS panels are perfect, however, as they have a lower contrast ratio than VA panels, so choosing one type over the other is a trade-off between viewing angles and contrast.

OLED is a different technology that uses self-emissive pixels. Each pixel turns itself on and off and emits light in all directions. This means that OLEDs have very wide viewing angles, even better than IPS panels, and they also have a near-infinite contrast ratio.

To improve viewing angles on VA panel TVs, companies have introduced viewing angle technology, like Samsung"s "Ultra Viewing Angle" and Sony"s "X-Wide Angle". This improves the viewing angles a bit at the cost of its contrast, but the contrast still isn"t as low as IPS panels. These TVs meet a common ground between viewing angles and contrast, without a decrease in overall picture quality. Samsung and Sony are the only two major manufacturers that have introduced such technology, and they"re generally only available on higher-end models.

In addition, by incorporating the 3 basic light colors in the same capsule, there is no visual interference when viewing contents from wide angles. In the screens with DIP LEDs, these angles are reduced due to the LED’s structure. Since the three basic colors are in separate LEDs, a slight loss of visibility of one of the colors may happen when viewing contents from extreme angles. This means that a color may dominate the image perceived by the spectator, degrading the image’s fidelity.

Different Glass structure comes with different viewing angles. Please refer to the image chart (right) to see unedited pictures of the actual glass types.

Viewing angle refers to a range of angles where the image displayed on a monitor remains suitable to the user. Generally, all monitors will show an optimum image when you"re sitting near the center of the panel. However, things can quickly go awry when you shift the position of your head left, right, up or down depending on what type of panel your monitor users.

Regarding vertical viewing angles, it"s generally accepted that the center of the display should be somewhere between eye level and thirty degrees below your line of sight. Anything outside those parameters for vertical viewing angles could lead to eye strain. However, every person is different, and depending on your height, desk height and other factors, it might not be possible to hit this "sweet spot" in practice.

With LCD technology used in today"s computer monitors, the horizontal viewing angle typically maxes out at 178 degrees. But almost no one views a monitor at such extreme angles, and monitor manufacturers often fudge the numbers a bit when it comes to this specification. So, for example, two monitors could both be rated with a 178-degree horizontal viewing angle yet exhibit widely different performance which reaching the outer limits of that range.

So, what happens when you reach the edge of the viewing angle cone of a monitor? Depending on the monitor in question, you may see various amounts of brightness drop-off, a decrease in contrast ratio and color shifting. As you can see in the image above, IPS (in-plane switching) panels tend to have less color shifting off-axis than VA (vertical alignment) panels. TN (twisted nematic) panels, a much older technology, tend to be far interior to IPS and VA in both horizontal and vertical viewing angles.

Monitor manufacturers have attempted to compensate for some of these viewing angle deficiencies inherent with curved VA panels, which are popular in the gaming space.