The data that can be entered through these devices consist of audio, image, or even video. These input devices are often considered as a type of computer peripheral, and the other types include output devices and storage devices.
The keyboard is basically designed based on the idea of a typewriter. Different types of keyboards are available based on the nature of the work. On the keyboard, each key or button has a unique special symbol or character.
Some functions of symbols need pressing multiple buttons at the same time In some devices like Tablet PCs, the keyboard is present virtually inside the tablet to operate our computer system. A mouse is one of the main hardware components of any computer system. This important piece is also known as the computer mouse because of its great resemblance to mice. This small piece of hardware is an interface between the user and the graphical environment of the computer system.
It controls the cursor and allows computer users to select and move texts, icons, and files on the compute. This device can use special programs Optical Character Recognition to convert the scanned text into a plain text file that can be edited and saved as a normal computer document.
Scanners are not limited to documents and images. There are even scanners for scanning maps, books, camera negatives, and more. A touchpad is a pointing device that is organized with a touch sensor or surface.
The trackball is another name that is rarely used as a replacement for the Touchpad. It is a piece similar to a pencil eraser that exists between the letters H, G, and B on some keyboards mostly in quality computers. This device does the job of the mouse and by applying a little pressure to it, the cursor moves in the same direction on the screen. A joystick consists of a handle that moves at one end of a circle and sends its angle information to the computer in two or three dimensions.
Joysticks are commonly used to control movement and control in computer games, and many have built-in buttons for various commands. Light Pen is a stylus-shaped computer input device that uses its sensitivity to light to change data, select the text, or modify it. This device is used with PDAs and other hand-held devices to navigate programs and enter information on a screen.
The original form of this device was a CRT monitor that was used to manipulate information. A digitizer is a device that converts continuous image lines into digital code. This device is mostly used to transfer maps and shapes to a computer and convert a shape or image into computer digits.
It enables the user to draw images and graphics using the stylus as we draw on paper with a pencil. Going back to the flashlight example, when the button input is pressed by the user, a light turns on. The light here is the output of this simple electronic system. So, now that we know the roles of both an input as well an output, we can dive into why a monitor is an output device. As we saw in the flow diagram of output devices, information is sent from the processor to an output which it manipulates in a certain manner which depends on the type of output.
The monitor is a peripheral device that receives digital information from a host device like a computer , and then displays this information so that the user can view it. Since everything that occurs inside a computer is done using machine language, a monitor provides us with a visual representation of data that is easier for us to interpret.
The flow of information starts from inside the processing unit, and makes its way out toward the monitor which is the main reason why it is an output device. The Resolution of the monitor is determined by how many pixels it has.
The more pixels the clearer the image and the higher the resolution. Without going into too much detail, a CRT monitor contains an electron gun which sits at the back of the monitor. It fires electrons toward the front screen through a vacuum which exists within the tube of the monitor. The electrons then hit a phosphor coating on the inside of the front screen causing them to light up resulting in an image. It is made up of a liquid crystal material that is sandwiched in between two pieces of polarised glass.
When an electrical current is applied to the liquid crystal material, it lets different wavelengths of light pass through. Since the technology of monitors is evolving, so too is their connectivity and the cables they use. HDMI cables are much more efficient and effective than VGA cables as they can transfer more data which results in higher resolutions and frame rates.
It is also capable of transferring video and audio over one cable reducing the amount of wire clutter behind your computer. However, each type of monitor still requires a separate cable to provide its power, as the HDMI and VGA cable cannot provide power to the monitor. But, a monitor is not restricted to just being used with a desktop computer.
There are many other devices that a monitor can be connected to as an output device. Laptop — A laptop already comes with its own screen. But sometimes one screen might not be enough. You can extend your workspace by connecting a monitor to your laptop giving you two screens to get you work done more efficiently. Raspberry pi — A raspberry pi is pretty much a small computer that you can hold in the palm of your hand. It is a development board similar to an Arduino where you can create projects using coding along with a range of inputs and outputs.
The raspberry pi also has a video output. Comparisons of picture quality between component video and D-Terminal standards show that component video, with its three separate connectors, offers higher picture quality, due to structural characteristics of the cable and connector. Many believe this difference becomes even more marked with longer cables. Let's consider S-Video and composite video ports. Video consists of a brightness signal and a color signal, combined to create a composite video signal.
A composite video port transmits the composite video signal as is; an S-Video port transmits the composite signal separated into a brightness signal and a color signal. Since less processing is needed to combine and separate the brightness and color signals, an S-Video port provides higher picture quality than a composite video port. Additionally, there are two types of S-Video ports: S1, which can identify video with aspect ratios of and ; and S2, which can identify "letterbox" video with black bands above and below, to display aspect-ratio video on aspect-ratio monitors.
A display device receiving video with a aspect ratio or letterbox video performs the appropriate scaling to display the correct aspect ratio. They are likely to be phased out gradually in the future, except for applications requiring the connection of older video equipment such as VHS video decks or DV cameras.
Analog video interfaces, including D-Terminal and component video, can be summarized as follows, in descending order of general perception of picture quality: component video, D-Terminal, S-Video, and composite video. Let's conclude by returning to the subject of PC environments. While USB was not originally intended as a display interface, demand has emerged for an easier way easier than using a D-Sub cable to set up multi-monitor environments, particularly for laptops and low-priced netbooks.
These are then connected to LCD monitors. After the user installs a device driver, the PC recognizes the adapter as a monitor adapter. Users can create a multi-monitor environment in Windows by activating the secondary monitor connected to the adapter in Display Properties. In terms of display performance, these adapters are not well suited to uses that require high-speed response; they are associated with slight delays in reflecting mouse or keyboard operations.
These, too, are ideal for laptops and netbooks, since they allow users to use laptops connected to large-screen LCD monitors at their office desks or at home, then use the laptops for mobile use when out and about simply by unplugging a single USB cable. Ordering and questions 1 or contact us. A basic understanding of touch panels Is the beauty of a curve decisive for color reproduction?
A close look at LCD video performance The difference in image quality is perfectly obvious! LCD monitors feature a wide range of video input interfaces Driven by demand for higher-resolution monitor environments and the proliferation of high-definition devices, the types of video input interfaces "interfaces" hereinafter found in LCD monitors continue to proliferate.
Input terminals of the FlexScan EV monitor The interfaces for LCD monitors designed for use with PCs can be grouped into two categories: analog interfaces, carryovers from the days of CRT monitors, and the digital interfaces developed more recently.
Page Top. A D-Sub female connector photo at left installed on the monitor side and a D-Sub male connector center photo on the cable side. A D-Sub cable features a screw on each end of the connector that can be turned by hand to prevent unintended disconnection photo at right. A DVI-D female connector installed on the monitor side photo at left and a DVI-D single-link pin male connector installed on the cable center photo.
As with D-Sub cables, a DVI-D cable can be secured into place by turning the screws on either end of the connector photo at right. Pin layouts identify the DVI connector type. The HDMI connector has 19 pins. The DisplayPort and Mini DisplayPort connectors have 20 pins and an asymmetrical left to right connector.
The HDMI standard also defines a pin type-B connector compatible with resolutions exceeding p. HDMI cables come in two types: Standard category 1 , denoting those that have passed A High Speed cable is recommended when using high-definition signals such as p. DisplayPort female photo at left and male center photo connectors.
Although a DisplayPort cable resembles an HDMI cable, it has two hooks at the top of the connector to make it harder to disconnect accidentally photo at right. Eizo's D-Terminal female photo at left and male center photo connectors. Each connector end of a D-Terminal cable features a hook to prevent accidental disconnection photo at right.
The connector has 14 pins. On an RCA connector with three single pins in a row, the yellow pin is the composite female connector photo at left.
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