Sunday, December 9, 2012

Projector technology types and specifications


Projector technology types and specifications

LCD Technical Specifications: LCD projector product structure, performance and cost requirements, LCD panels with different sizes. LCD liquid crystal panel size determines the size of the projector, the smaller the LCD liquid crystal panel Unit, the optical system of the projector can be made the smaller, so that the smaller the projector. But to achieve high resolution on a small LCD, and maintain a high brightness, and the difficulty of its technology can be imagined. 0.9-inch and 0.7-inch panel production, the ratio reached 70%, the proportion of 1.3 inches in about 15%, 0.5-inch, 0.79-inch, 0.99-inch and 1.0-inch panel for projector products. On the number of liquid crystal panel, since the monolithic structure in the aspects of performance and color defects is substantially eliminated. Mainstream 3-LCD projector, outstanding performance in terms of performance and color in a very long time, and represents the most mature level of projector product development. In the case of the same brightness and resolution, the the projector smaller the size the higher the price corresponding.
DLP Technical Specifications: LCD technology, the DMD chip size is an important factor to determine the size and weight of the projector, and Texas Instruments also introduced 0.55 inches, 0.7 inches, 0.9 inches and 1.1 inches of a variety of sizes chips. DLP projector, the most common structure of single-chip and three-two, three-structure theater systems and high-performance products are mainly used in the ordinary application of the common market, all the products are monolithic structure, people comparison of general talk about DLP technology and LCD technology, mainly based on the comparison between the single-chip DLP technology and 3-LCD technology. The single-chip DLP projector dichroic color wheel to achieve three primary colors with the same imaging components, compared with the three primary colors have imaging system 3 LCD projector, single-chip DLP projector in color saturation has been than three LCD projectors difference. The first generation of DLP projector color wheel speed of 60Hz, second-generation DLP color wheel speed doubled, still 120Hz to 120Hz, the next generation of DLP projector color wheel speed, but the color wheel with 6 separations (3 separations), equivalent to improve the speed and doubled, reached 240Hz. Current DLP projector color performance has been greatly improved, but compared to LCD products, the products of most of the single-chip DLP projector color performance is still lagging behind.

Projector terminology


Projector terminology

ANSI lumens
The main performance indicators of the projector, the unit of measurement for the brightness, the U.S. National Bureau of Standards lumens display device has a standard, this a standard measurement of brightness is usually ANSI Lumens. In general, the higher the lumens, the brighter the projector more upscale. The measurement screen brightness of the projected image: the image of one square meter were divided into nine in, measuring the value of each central point of light, and then calculated the average of nine.
CRT tube focus performance
CRT projector decomposition to the input source signal R (red), G (green), B (blue) under high pressure on the phosphor screen of three CRT tubes, light emitting, via a signal amplifier and a converging, shown on a large screen a color image. The focus of the CRT tube is divided into electrostatic focusing magnetic focusing and electromagnetic composite focus three, electromagnetic composite focusing more common, it is to focus performance, high focus accuracy can partition focus and corner focus, clear projection screen .
High pressure mercury lamp
A light source for generating a liquid crystal projector, the original lamp followed by a voltage, the high potential difference at the same time to generate heat, the mercury vaporized mercury vapor in a high potential difference, by the excitation discharge is generated between the pole pitch, the internal halogen element, there is the function of the catalytic and protection; its advantages as a light-emitting brightness, long life, LCD projectors currently on the market most of the ultra-high pressure mercury lamp.

Monday, December 3, 2012

Projector in the Top 10 Considerations

Projector in the Top 10 Considerations



1 Try to use original projector cables, wires
2 projector uses to stay away from water or damp places

3 Note that dust, dust control measures can be taken after consulting professionals

4 projector away from the heat source

5. Attention to the nominal value of the supply voltage, the machine ground and power polarity

Not user serviceable and open the body, internal cable replacement parts as much as possible to use the original accessories

7. Projector when not in use, you must cut off the power

8 projector use, such as abnormal situation, first unplug the power

9 Note the use of the first projector cooling

10. Machine moving great attention, gently, transport attention to packaging, shock