Monitor Screen
Sunday, June 12th, 2011
Monitor Screen
How To Select The Best Touch Screen Lcd Monitor
Touch screen monitors seem to be everywhere. The great thing about them is that they are extremely easy to use. The touch screen is like an invisible keyboard, but it displays only as much data and button choices as users need to complete a task, or set of tasks. That explains their popularity in devices from mall kiosks to complex industrial machinery.
The most important decision in selecting the best touch screen monitor for your application will be the type of touch screen technology to use. There are several types, each with its own advantages and disadvantages. We will cover the three most common types:
Resistive Technology
A resistive touch screen monitor is composed of a glass panel covered with thin conductive and resistive metallic layers, separated by a thin space. When a user touches the screen, the 2 layers touch at that point. The computer detects the change in the electrical field and calculates the touch point.
Resistive touch screens are generally the most affordable, but they only offer approximately 75-80% image clarity. The touch can be activated with nearly any type of object (stylus, gloved finger, etc.), but the outer surface can be damaged with sharp objects.
Capacitive Technology
In a capacitive touch screen monitor, a layer that stores a continuous electrical current is placed on top of the monitor's glass panel. When an exposed finger touches the monitor screen, some of the electrical charge transfers to the user. This decrease in capacitance is detected and located by circuits located at each corner. The computer then determines the touch point.
Capacitive touch screens are a durable technology that is often used in kiosks, point-of-sale systems and industrial machinery. Capacitive touch screens have a higher clarity than resistive-type (88-92%), and have greater endurance (up to 225 million touches) than a Resistive-type. However, capacitive screens can only be activated with an exposed finger (no gloves, pointers, etc.)
SAW Technology
SAW (Surface Acoustic Wave) touch screen monitors utilize a series of transducers and reflectors along the sides of the monitor's glass plate to create an invisible grid of ultrasonic waves on the surface. When the panel is touched, a portion of the wave is absorbed. The receiving transducer locates the touch point, and sends this data to the controller.
SAW touch screens have no layers on the screen, thus enabling over 90% image clarity, and can display high-detail graphics. They can be activated by a finger, gloved hand or soft-tip stylus. However, SAW panels are the most expensive of the three, and moving liquids or condensation on the face can cause false-triggers; solid contaminants on the screen can create non-touch areas, until they are removed.
Other Considerations
Other factors to consider in your selection process include:
Interface: Touch screen panels must communicate with the computer. The most common interface types are RS-232 and USB. New HID-compliant touch screen monitors eliminate the need for drivers.
Mounting: Options include panel mount, rack mount and free-standing. If free-standing, be sure that it uses a heavy-duty stand designed for touch screen; standard table top bases will topple over.
Environment: Touch screen monitors are available in standard, stainless steel and waterproof enclosures for a variety of environments.
Screen Size: Touch screen monitors are available form 3.5" to 52". The most common sizes are 15"-19", and 32"-42" for large control rooms. The aspect ratio (4:3 or 16:9) should also be considered.
The type of touch screen monitor you select will be contingent upon many factors, including type of data to be displayed (video, graphics, text), the intended users, the operating environment and where/how it will be mounted. Chosen correctly, touch screen monitors will be an excellent addition to your system.
For information on specific Touch Screen monitor details, please visit the TRU-Vu Monitors web site at http://www.tru-vumonitors.com/products/touchscreenmonitors.html
About the Author
Owner of TRU-Vu Monitors, Inc.
www.tru-vumonitors.com
What is the perfect geometry for the screen of a 17' monitor?
I would like to know the pincushion, trapezoid, parallelogram, pin balance, and the top and bottom corners. I have been having problems setting my monitor screen the way it was before. I am hoping some one can give me the numbers on their monitor and see if that helps me. I don't have a reset button on the menu of the monitor but if some one can help me figure this out it would be most appreciated.
There are no perfect numbers. It is going to vary from monitor to monitor and from mode to mode.
If the manufacturer knew the perfect numbers they would not be putting the controls on there for people to mess with.
The best I can suggest is that you go though these controls in sequence a few times. After a two to four of cycles it should look good.
Adjust trapezoid so that the sides look roughly symmetrical
Adjust parallelogram so that the top corners are above the bottom corners.
Adjust pin balance so that both sides are equally curved.
Adjust pincushion to get the sides as straight as possible. Particularly in the middle.
Adjust the top and bottom pin to get the sides as straight as possible.
Repeat.
It may help to reduce the height and width a little so that all the corners are visible on the screen.
Monitor Screen
LCD monitor had white screen. Make SVA Model number 2400W-BD
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What Is a Personal computer Monitor?
A computer monitor is the device that's employed to display images generated by the personal computer. There's only two principal sorts of pc monitors, LCD (Liquid Crystal Display) personal computer monitors, and CRT (Cathode Ray Tube) monitors. CRT monitors have been around for a extremely long, lengthy time. The initial CRT monitors have were created around the early 80s. They've been in primary stream use for at least 35 years, and have undoubtedly seen greater days, with LCD TVs taking over 50% of the market share for 2008. LCD personal computer monitors have only truly been well-liked for the last 5-6 years as they've turn out to be far more inexpensive for the average user. Now it's not uncommon to locate an excellent 22" LCD monitor for around $200, and that's beginning to get up into the premium models.
The monitor's screen size is measured diagonally, CRT monitor's screen size is normally smaller than the labeled size by 1.5-2 inches, so a 19 inch CRT monitor has the identical screen size as a 17 inch LCD pc monitor. In the older days personal computer monitors aspect ratio had been often 4:3, but now that we've discovered wide screen technology the aspect ratio has changed to 16:9 or 16:10, since it allows for more screen space sideways to get an improved picture. CRT monitors typically do not come in wide screen sizes. That's something you'll want to be careful of when purchasing a CRT monitor, because it might seem like it's bigger, but that's mostly because of the cathode ray tube, circuitry and the enclosure.
CRT Monitors
CRT monitors contain the display device (which is the cathode ray tube), the circuitry to generate the pictures from the computer's electronic signals, as well as the enclosure, this could not seem like a lot, but the bulk of it is the cathode ray tube. And that's why CRT monitors are becoming so uncommon due to their heavy weight, and bulky size.
CRT monitors generate their screen images by making use of a cathode (heated filament) inside a vacuum sealed glass tube. The electron gun fires off electrons at the cathode and they come into contact with the phosphor coated screen that glows when it's struck by the electron beam.
LCD Personal computer Monitors
The LCD personal computer monitor, when compared to a CRT display is a main improvement in appearance and size. LCD pc monitors screen size can be a a lot much more accurate representation of the screen size. LCD personal computer monitors are only as thick as the circuitry and also the LCD screen inside the case. This means the average thickness varies from 1-2 inches, if that, though the larger you go the thicker the size gets. I have a 32 inch LCD TV whose thickness is about three inches. I know, but that extra inch makes a massive distinction.
LCD personal computer monitors are made up of two pieces of polarized glass that hold a liquid crystal material between them. The backlight creates light that passes through the first piece of glass, whilst this is happening electrical currents force liquid crystal molecules to align; that enables varying levels of light to pass via to the second piece of glass to produce the colors and images on the screen.
About the Author
More about lcd computer monitor reviews,visit at lcd computer monitor reviews
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Monitor Screen