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        Q: Digital Notetaking Device?
A: DMD ( Digital Micro-Mirror Device )  The chip in a DLP video projector or DLP rear-projection tv , that produces the image to be projected . The letters DMD stand for Digital Micromirror Device . Every pixel on a DMD chip is a reflective mirroring . The video image was demonstrated on the DMD chip . The micromirrors on the chip ( remember : each micromirror constitutes one pixel ) subsequently tilt very speedily as the image modifications . This process produces the greyscale foundation for the image .   In a single chip projection system , color is added as light passes through a hi-speed colour wheel and is reflected off of the micromirrors on the DLP chip as they speedily tilt towards or away from the light source . The degree of tilting of each micromirror taken together with the speedily spinning colour wheel shall determine the colour structure of the projected image . As the amplified lighting bounces off the micromirrors , it is dispatched through the lens and is feasible to projected on an enormous screen .   In more advance projection systems that use a 3-Chip designing ( one chip for Red , one chip for Green , and one Chip for Blue ) the spinning colour wheel 're not requires .  http : //hometheater.about.com/od/televisi ...   A digital micromirror device , or DMD , represent an optical semiconductor that 's the core of DLP projection technology , and was invented by Dr. Larry Hornbeck and Dr. William E. `` Ed '' Nelson of Texas Instruments ( TI ) in 1987 .   The DMD project was initiated as the Deformable Mirror Device in 1977 , using micromechanical , analogue light modulators . The firstly analogue DMD product was the TI DMD2000 airline ticketing printer that usage a DMD rather than a laser scanner .   A DMD chip has on its surface various hundred thousand microscopic mirrored organizing in a rectangular array which corresponds to the pixels in the image to be demonstrated . The mirrored is feasible to individually rotated ±10-12° , to an on or off state . In the on state , lighting from the projector bulb is illustrated byto the lens making the pixel appear bright on the screen . In the off state , the lighting is directed elsewhere ( generally onto a heatsink ) , making the pixel appear dark .   To produce greyscales , the mirroring is toggled on and off very rapidly , and the proportions of on time to off time shall determine the shading produced ( binary pulse-width modulation ) . Contemporary DMD chips can produce up to ten24 shades of gray ( 10 bits ) . See Digital Light Processing for debates of how colour images are generated in DMD-based systems .   The mirrored themselves are made out of aluminium and represent around sixteen micrometers throughout . Each the first is mounted on a yoke which in turning 's connected to two supporting posts by compliant torsion hinges . In this kind of hinge , the axle is fixed at both terminates and literally twists in the mid . Becauses of such little scale , hinge tiredness 're not a problem and tests have displayed that even one billions ( 1012 ) operations do not cause perceptible harm . Tests have also displayed that the hinges were not able be adversely affected by ordinary shock and vibration , because it is absorbed by the DMD superstructure .   Two pairs of electrodes control the position of the mirroring by electrostatic attractiveness . Each pair has one electrode on both sides of the hinge , with one of the pairs positioned to act on the yoke and another acting directly on the mirroring . The majority of members of the time , equals partiality charging were applicable to two sides concurrently . Instead of flipping to a central stance as one might expect , thare in fact holds the mirroring in its current stance . This is because attractiveness force on the side the mirroring 's already tilted towards are largeer , since that side 's closer to the electrodes .   To move the mirrored , the require state is first loaded onto an SRAM cell situate underneath each pixel , which 's also linked to the electrodes . Once all the SRAM cells have been loaded , the partiality voltage is deleted , enabling the charging from the SRAM cell to predominate , moving the mirroring . When the partiality is reinstated , the mirroring are again be conducted in stance , and the next require movement is feasible to loaded onto the memory cell .   The partiality system utilized , since it reduction the voltage tiers need to deals with the pixels such that they were able be driven directly from the SRAM cell , and also because the bias voltage is feasible to removed at the same time for the whole chip , so every mirroring moves at the same instantaneous . The benefits of the latter are far more exact the timetable and a more filmic moving image .  http : //en.wikipedia.org/wiki/Digital_mic ... 

Q: Benq projector help?!?
A: BenQ does make a very pleasant projector based on DLP technology . If you 're subject to RBE ( rainbow effect ) I would propose a LCD or LCOS based projector at a much less pricing range than BenQ , but would still offer you an additionalordinary picture . Some of those models would be the Sony HW10 , the new Panny 3000U , the Epson 1080UB and in the higher pricing range JVC HD1/HD100 models , Sony VW60/70 . All of these are full HD projectors with the ones cited earlier being cheaper in pricing .   Good luck and enjoy .