Each lens on the DMD array is electrostatically tilted to an on or off state by addressing the memory cells under each lens with a binary planar signal. The technique of determining in which direction each lens is tilted is called pulse width modulation (PWM). The lens can be switched more than 1000 times in one second, at which point DLP becomes a simple optical system. After passing through the concentrating lens and the color filtering system, the light from the projection lamp is directly incident on the DMD. When the lenses are in the open position, they reflect light through the projection lens onto the screen to form a digital square pixel projection image. When the DMD seat plate, projection lamp, color wheel, and projection lens work together, these flipped mirrors can reflect the image together on the demo wall, movie screen, or TV screen.
DMD offers 16.7 million colors and 256-segment gray levels to ensure that the DLP projector's projected motion picture is colorful, natural and realistic.
With up to 2048 x 1152 arrays, each DMD can generate approximately 2.3 million mirrors. This DMD has the ability to make true HDTVs.
The exceptional fast switching speed of DMD micromirror devices combined with a precise image color and grayscale copying technique for dual pulse width modulation allows images to be sharper as the window is refreshed, enhancing contrast, depicting boundary lines and separating Erasing defects in the image with a single color.
In many LCD projection images, we will see that when an image size increases, the gap in the LCD image will become larger, but in DLP projectors, the size and shape of the DMD mirror will not be determined. It's all. 90% of the area of ​​each lens dynamically reflects light to create a projected image. Since one lens is so close to the other, the image appears to have no gaps. DMD lenses are small in size with a length of 16 microns on each side and a gap of less than 1 micron between adjacent lenses. The lens is square, so each lens displays more content than the actual image. In addition, when the resolution is increased, the size and spacing remain the same, so the image always maintains high definition regardless of the resolution.
Many viewers often want to maintain brightness or open curtains while viewing a projection. Compared to conventional projectors, DLP projectors put more light onto the screen, depending on the technical characteristics of the DLP itself. DMD's strong reflective surface maximizes the use of the projector's light source by eliminating obstacles on the light path and reflecting more light onto the screen. DLP technology reflects the image according to the content of the image. The DLP light source works in two ways, either by a lens or on a screen, or directly into a light absorber. More advantageously, the brightness of a projector based on DLP technology increases as the resolution increases. In the case of higher resolutions such as XGA and SXGA, the DMD provides more reflective area, which makes it possible to make more efficient use of the brightness of the light.
According to the general application requirements, a single-chip DMD can achieve uniformity of size, weight and brightness. At present, most domestic or commercial DLP projectors adopt a single-chip structure, while the more advanced three-piece structure is generally only applied. In the digital cinema or high-end world, users can get a system that is smaller, brighter, more portable, and capable of providing excellent image quality. DLP technology is an all-digital infrastructure with minimal signal noise.
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