In the text, we introduce the core of the DLP projector, the DMD chip, in graphic form. How DMD chips work Micromirror structure In DMD chips, micromirrors are the smallest unit of work and the key to their performance. Micromirrors are very small in size, but still have a complex mechanical structure different from liquid crystals - each micromirror has a separate support frame and is deflected by +/- 12° around the hinged oblique axis. For micro-mirrors such as micro-mirrors, traditional mechanical or hydraulic control is no longer available (even if it can be used, it can be quickly damaged by mechanical wear), so two electrodes are placed at the two corners of the micro-mirror, and the voltage is passed. Control control deflection for high precision control and unlimited polarization lifetime. Micro-mirror working diagram The micro-mirror works by reflecting light, and its deflection capability is the key. As shown in the above figure, this is a working diagram of a micro-mirror with a deflection angle of +/- 12°. When the micro-mirror is on (On State, +12°), the incident angle of the incident light (light source) reaches 12°, and the reflection angle is also 12° (the sum of the two is 24°). At this time, the maximum light energy is (255, 255, 255); When the micromirror is off (Off State, -12°), the light received by the lens becomes smaller and smaller. When it reaches the off state, the brightness is the lowest, which is (0, 0, 0). Micro mirror working side view A micro-mirror can only provide +/-12° deflection, but the actual situation provides a working range of 72°. Considering that the micro-mirror is controlled by the electrode, it can be regarded as a stepless flip. Extremely high brightness control is provided in a single pixel, making it easy to achieve high contrast.
The shockproof pressure sensor is the most commonly used sensor in industrial practice. It has shockproof function and has a certain benign response in case of various shaking. It is widely used in various industrial automatic control environments, including water conservancy and hydropower, railway transportation, intelligent construction, production automatic control, aerospace, military industry, petrochemical, oil well, electric power, ship, machine tool Pipeline and many other industries.
The integrated sensor is manufactured with standard process technology for producing silicon-based semiconductor integrated circuits. Usually, some circuits used for preliminary processing of the measured signal are also integrated on the same chip.
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