You are about to purchase a multimedia projector, and the first question you need to ask is, Why do I need it? It makes sense, doesn’t it? Let’s try to explain. The primary and primary function of multimedia projectors (or video projectors, as they are also called) is to create an image from any device that generates video signal while in operation (VCR, DVD player, computer, camcorder, etc.).
The working principle of a multimedia project is very similar to the principle of operation of a slide projector – the light from the lamp passes through an image block (in a slide projector, that block is actually a slide, in a multimedia project a set of very complex devices, which we will discuss below), and then the image is displayed on screen with lens.
This, image size can vary from 1 m in a row 20 Meters or more. Therefore, you can make a professional presentation by displaying advertisements, texts, graphs and tables, or you can turn your house or your home into a home theater. All multimedia projectors have a set of features that define their capabilities and potential applications. The main features are: bright light, adjustment, imaging technology, weight. Let’s start with weight. The weight of the projector determines its basic use. For example, if a projector stays in one place, its weight is less important.
If the projector needs to be delivered from time to time (or there is talk of moving it from the table to the cupboard), it is worth considering a portable project. Stable projectors (weighing more than 10 kg) portable projectors (weighing 5 to 10 kg) Fixed projectors (weighing 2 to 5 kg) weigh not only weight, but and in practical and practical skills. Multimedia portable projectors offer superior technical skills, quality and performance from standard mobile models in general. Ultraportable projectors can achieve a good balance between operation and mobility, and, ultimately, micro portable projectors, with the lowest weight and the most demanding set of tasks, are a real blessing for entrepreneurs who often travel around the world. The next important factor is light penetration.
Determines how large the screen can be while maintaining an acceptable image brightness. Also, bright light determines how light can shine in a room where a multimedia projector is used. At present, microportable and ultraportable models are characterized by bright light from 1100 to 2000 Lm. A bright light of 2000 Lm is enough to show bright images on a 1.5 x 2 meter screen, no matter how bright (this is true for homework and as long as the screen is not exposed to direct sunlight). The top light bar for portable models, and especially for those standing, is already rated by tens of thousands of lights. Today, in the production of multimedia projectors, 2 image processing technologies are used.
This liquid crystal technology (LCD, Liquid Crystal Display) and digital light processing technology (DLP, Digital Light Processing) , transparent liquid using a crystal panel, in which the image is created using an electronic electronic circuit. The light of the lamp passes through the panel and lens, and the image is redone on the screen, enlarged several times. In DLP projectors, light is reflected on a special chip (microcircuit) about 15×11 mm in size, where about a million micromirrors form an image and enter the screen through a lens. To get a color picture, LCD projectors use three panels – with red, green and blue colors respectively. For low-cost DLP projectors, object colors are displayed on the screen at high frequency (single-chip) one after the other.
Three micromirror color color chips are used for high quality, functional multimedia projectors. Each of these technologies has its many advantages: LCD projectors are characterized by high brightness and color saturation. DLP projectors are distinguished by high image comparisons, in addition, DLP technology that allows you to create ultra-lightweight portable and portable projects. The smallest object that makes an image on an LCD panel or DLP chip is called a pixel.
The number of pixels placed horizontally and vertically on an LCD panel or DLP chip determines the next aspect of the project solution. Project configurations focus on computer video standards: most modern SVGA projects (800 x 600 pixels) or XGA resolutions (1024 x 768 pixels). High SXGA processors (1280 x 1024) and UXGA (1600 x 1200) are also available. Project adjustment shows how well we are able to display the image.
High quality image will be available if the image resolution from the computer is similar to the resolution of the LCD panel or DLP chip, in high or low resolution, the image will be displayed with minimal distortion. The computer is similar to the LCD panel or DLP chip, at higher or lower resolutions, the image will be displayed with minimal distortion. a little.