What Are the Different Types of LED Home Theater Projectors?

LED projectors are also called LED projectors, and LEDs (Light Emitting Diodes) are also called light emitting diodes. This technology has long been used in the field of display and lighting. The body of an LED is a piece of electroluminescent semiconductor material. The stronger the current, the stronger the light emission. The principle of LED lighting is different from traditional UHE and UHP bulbs. It does not generate a lot of heat during the lighting process, so the life can reach more than 10,000 hours.

LED projector

LED projectors are also called LED projectors, and LEDs (Light Emitting Diodes) are also called light emitting diodes. This technology has long been used in the field of display and lighting. The body of an LED is a piece of electroluminescent semiconductor material. The stronger the current, the stronger the light emission. The principle of LED lighting is different from traditional UHE and UHP bulbs. It does not generate a lot of heat during the lighting process, so the life can reach more than 10,000 hours.

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With the advancement of technology, this technology is applied to

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LED micro-projectors, especially LED intelligent micro-projectors, have gradually become the new favorite of digital hipsters from 2012. The reasons for this, the increase in brightness, breakthroughs in appearance, and leap in playability have contributed to the entire market. Now I will introduce the basic knowledge of the projector one by one for the projection whites.

ANSI lumens

The main performance indicator of a projector is a unit of measurement of brightness. The US National Bureau of Standards has set a standard for the number of lumens of display equipment. The brightness measured by this standard is usually expressed in ANSI Lumens. Generally speaking, the higher the number of lumens, the brighter the projector, the higher the level of the projector. Method for measuring the brightness of the projected image on the screen: divide an image of one square meter into nine parts, measure the light value of the center point of each part, and then calculate the average value of the nine points.

DLP technology

DLP technology is the abbreviation of "Digital Light Procession".

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Processing, which means that this technology must first digitally process the image signal, and then project the light. It is a technology based on digital micromirror device (DMD) developed by TI (Texas Instruments) to complete visual digital information display technology. To be specific, DLP projection technology uses digital micromirror chip (DMD) as the main key processing element to realize digital optical processing.

RGB color mode

RGB color mode is a color standard in the industry. It obtains various colors by changing the three color channels of red (R), green (G), and blue (B) and superimposing them on each other. Yes, RGB is the color that represents the three channels of red, green, and blue. This standard includes almost all colors that human vision can perceive. It is one of the most widely used color systems.

Screen aspect ratio and picture size

Screen width / height ratio / screen size Projection screen width / height ratio refers to the vertical and horizontal ratio of the screen image. The screen width / height ratio can be expressed by the ratio of two integers or by a decimal number, such as 4: 3 or 1.33. . The aspect ratio of computer and data signals and ordinary television signals is 4: 3 or 1.33, and the aspect ratio of movies and DVDs and high-definition televisions is 16: 9 or 1.78. When the aspect ratio and display of the input source image

When the aspect ratio supported by the display device is different, the picture may be distorted and missing. There are three ways to display the 16: 9 image on the 4: 3 screen: the first is the Anemographic method. When the image is full horizontally, it is stretched vertically until it is full, so that the image looks thinner than the original ; The second method is the character box-A (Letterbox-A) method, the 16: 9 image remains undistorted, but leaves a black bar on the top and bottom of the screen; the third method is -B (Letterbox-B) The method is a compromise between the first two methods. The two sides of the horizontal direction extend beyond the screen, and the vertical black bars are narrower than the second. The aspect ratio of the image is 14: 9. In order to meet the needs of home theaters, the current home projectors usually have a screen aspect ratio of 16: 9.

The screen size refers to the size of the projected image. It has a minimum image size and a maximum image size. It is generally expressed by the diagonal size, and the unit is inch. This index is determined by the projection optical zoom performance. To cast a predetermined size, the projector needs to be placed at a distance corresponding to the screen. The relationship between screen size and projection distance varies depending on the lens and brightness of various projectors. Generally speaking, a projector with a higher brightness can project a larger picture. The projector has a minimum picture size and a maximum picture size according to the focal length of the lens. The picture projected by the projector between these two sizes can be clearly focused. Beyond this range, the picture may appear unclear and poorly projected.