Introduction
There are many different types of computer projector: CRT, DLP and LCD, to name a few. The one best known is the Liquid Crystal Display projector. The LCD projector uses heat from a halogen bulb to convert the crystal into liquid so that images are displayed in a fluid motion. In this article, we will learn the technology behind the LCD computer projector and see how it works.
How Does It Work?
There are three panels inside the LCD projector. The halogen bulb is placed in the center so that the panels surround it. It is the job of the panels to produce light. The crystals melt when the halogen bulb heats up, allowing light to pass through. The intensity level of the halogen bulb determines the tone of the images; more heat from the bulb brings lighter tones. Electric voltage that travels through the projector controls the heat produced by the halogen bulb.
The projector connects to the computer and acts as a monitor. The images travel through the cable connected to the computer and to the tube inside the projector. The screen is coated with phosphor to allow the images to bounce on it. Each portion of light from the projector onto the screen is a pixel. To produce color images, the pixel is broken down into red, blue and green color components. The three different panels of the LCD projector are able to produce more than 16 million colors based on the intensity and variations of the three primary colors.
Each panel handles its own color, which is why there are three panels for the three primary colors. Each panel will send a beam of light for the colors. The colors produce the true color of the image once they hit the screen and combine with each other.
LCD Projector Resolutions
The LCD projector's resolution is defined by which of the four different categories it falls into. UXGA (1600 by 1200) is the highest and most expensive one on the market. This type of projector can support a wide range of computers. Many business offices that rely on presentations on a regular basis tend to favor the UXGA model. The next one down is the SXGA (1280 by 1024). The SXGA is used by individuals with high-end computers because it offers high-resolution images and is useful when something as powerful as the UXGA isn't needed. XGA (1024 by 768) is used more by consumers because of its low price tag compared to the first two models. The images aren't as clear as the UXGA and SXGA, but the XGA still offers great images. The model that is used the most is the SVGA (800 by 600) because it is the least expensive of all the LCD projectors. This is ideal for personal computers and still offers great image quality.
When trying to decide which one is ideal for your home or office, remember that the LCD projector's cost is determined by the resolution. If you don't need the added resolution or cost, stick to the SVGA models. However, there are times when the UXGA models are more ideal for business and gaming purposes because of the excellent image quality.
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