![]() ![]() Digital Light Processing (DLP)ĭLP projectors are utilized for front and back projection units and can be classified as one-chip or three-chip. The below picture represents how looks an LCD projector. Comparing with CRT technology, the display in LCD technology is much thinner. Generally, these kinds of display panels are used in many devices, such as cell phones, portable video games, Laptops, computers, and TVs. LCD projectors have excellent color reproduction and are cheaper to produce, which makes them more popular as compared to many alternatives. They utilize liquid crystal to display images, data or video, and function on transmissive technology. Liquid Crystal Display (LCD)Īn LCD projector is a type of projector based on liquid crystal displays, which is widely used in business seminars, presentations, and meetings. As compared to newer technologies, the projectors are capable of compatible with new improvements hence, they are nevertheless. Although according to users, the picture quality of CRT projectors is brilliant, it may be tricky and difficult to set up a CRT projector at the initial stage. ![]() An example picture of a CRT projector is given below.ĬRT projectors are not commonly in use today, as they consume high electricity and are heavy in weight, and large in size. Instead of a single-color CRT, most of the modern CRT projectors have colored (red, green, and blue) CRT tubes and their own lenses to generate color images and commonly come with color features. In the early 1950s, color CRT projectors came on the market for the first time. A Lens is kept in front of the CRT face through which the image is focused and enlarged onto a screen. Cathode Ray Tube (CRT)Ī CRT, which stands for Cathode Ray Tube projector, is a video projecting device that uses a cathode ray tube (which is small and high-brightness) as the image generating element. In modern times, CRT projectors are no longer in use because they provided low light output and came in a large size. However, CRT (cathode ray tube) projector is another type of projector, which was popular in the earlier times of projectors. The LCD (liquid crystal display) and DLP (digital light processing) are two common types of projectors. Commonly rear projection is used in commercial areas where more space is available and also used in outdoor settings. This method provides better contrast as compared to front projection and is less affected by ambient light. In the rear projection, the pictures are sent from behind the screen toward the audience. This process does not need an empty space back side of the screen therefore, this process is most common. ![]() In the front projection, the pictures are sent to the front of the screen from the audience. The screen is the difference between both types of projection, which is semi-transparent grey for rear projection and non-transparent white for front projection. Projectors can be used for displaying pictures or videos on the front or rear. In modern times, the cost of projectors has decreased, like a bright, high-quality projector has been reduced to a few hundred dollars with the help of LCD and LED light sources. In the early time, there were needed much high amount thousands of dollars for high-quality projectors, and more than a hundred dollars were required for bulbs alone. On the other hand, some of the projectors have the potential to support Wi-Fi and Bluetooth conectivity, and most projectors are designed in a way that they can have different input sources, such as VGA ports for older devices and HDMI ports for newer equipment. The main applications of these kinds of projectors are places of worship, conference rooms, classrooms, and auditoriums. Ceiling-mounted projectors come in a large size with a long-distance like 30 feet or more. They may be portable and freestanding and can be mounted on ceilings. The projector looks like the below picture.Ĭommonly, projectors come a few inches tall and about a foot long and wide. Projectors come in many shapes and sizes and are used in conditions like a classroom, home cinemas, office training or presentation sessions, etc. It takes images generated by a Blu-ray player or a computer and projects them onto a large surface like a wall or white screen. A projector is an output device that is capable of connecting to a computer, which may be an other option for a monitor or television in terms of displaying pictures to a large number of people. ![]()
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