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1477results about How to "Improve fill factor" patented technology

Micromirror elements, package for the micromirror elements, and projection system therefor

InactiveUS6962419B2Minimize light diffractionContrast ratio is reducedTelevision system detailsProjectorsLight beamLight diffraction
In order to minimize light diffraction along the direction of switching and more particularly light diffraction into the acceptance cone of the collection optics, in the present invention, micromirrors are provided which are not rectangular. Also, in order to minimize the cost of the illumination optics and the size of the display unit of the present invention, the light source is placed orthogonal to the rows (or columns) of the array, and/or the light source is placed orthogonal to a side of the frame defining the active area of the array. The incident light beam, though orthogonal to the sides of the active area, is not however, orthogonal to any substantial portion of sides of the individual micromirrors in the array. Orthogonal sides cause incident light to diffract along the direction of micromirror switching, and result in light ‘leakage’ into the ‘on’ state even if the micromirror is in the ‘off’ state. This light diffraction decreases the contrast ratio of the micromirror. The micromirrors of the present invention result in an improved contrast ratio, and the arrangement of the light source to micromirror array in the present invention results in a more compact system. Another feature of the invention is the ability of the micromirrors to pivot in opposite direction to on and off positions (the on position directing light to collection optics), where the movement to the on position is greater than movement to the off position. A further feature of the invention is a package for the micromirror array, the package having a window that is not parallel to the substrate upon which the micromirrors are formed. One example of the invention includes all the above features.
Owner:VENTURE LENDING & LEASING IV +1

Shunting-type isothermal sulfur-tolerant conversion process and equipment thereof

ActiveCN101704513ASatisfy conversion rate requirementsMeet the requirements of adiabatic conversion control temperature riseHydrogenChemical industryShunt typesSulfur
The invention discloses a shunting-type isothermal sulfur-tolerant conversion process. The process comprises the following steps: shunting raw coal gas from exterior into at least two parts; leading overheat stream in the first part of the raw coal gas to increase the temperature to 200-300 DEG C; and then entering a first-stage conversion reaction step to carry out a conversion reaction and generate first conversion gas; and conveying the other part of the raw coal gas to next-stage conversion reaction step to carry out a conversion reaction. The catalyst bed of a shift converter has the advantages of stable temperature, simple control, convenient operation and low output CO content. The invention has the advantages of short conversion flows, few equipment, reduced resistance, great byproduct stream amount, high overheat temperature, stream pressure and heat recovery rate, and the like, thereby achieving the aims of reducing conversion stages, equipment number and resistance fall, decreasing investment, having great byproduct stream amount and high overheat temperature, stream pressure and heat recovery rate, reducing conversion stream consumption and outward wastewater discharge, protecting the environment and easily maximizing the device equipment. The invention also discloses shunting-type isothermal sulfur-tolerant conversion equipment used by the process.
Owner:SHANGHAI INT ENG CONSULTING

Projection display

In order to minimize light diffraction along the direction of switching and more particularly light diffraction into the acceptance cone of the collection optics, in the present invention, micromirrors are provided which are not rectangular. Also, in order to minimize the cost of the illumination optics and the size of the display unit of the present invention, the light source is placed orthogonal to the rows (or columns) of the array, and / or the light source is placed orthogonal to a side of the frame defining the active area of the array. The incident light beam, though orthogonal to the sides of the active area, is not however, orthogonal to any substantial portion of sides of the individual micromirrors in the array. Orthogonal sides cause incident light to diffract along the direction of micromirror switching, and result in light ‘leakage’ into the ‘on’ state even if the micromirror is in the ‘off’ state. This light diffraction decreases the contrast ratio of the micromirror. The micromirrors of the present invention result in an improved contrast ratio, and the arrangement of the light source to micromirror array in the present invention results in a more compact system. Another feature of the invention is the ability of the micromirrors to pivot in opposite direction to on and off positions (the on position directing light to collection optics), where the movement to the on position is greater than movement to the off position. A further feature of the invention is a package for the micromirror array, the package having a window that is not parallel to the substrate upon which the micromirrors are formed. One example of the invention includes all the above features.
Owner:TEXAS INSTR INC +1

Semi-conductor perovskite solar cell and preparing method thereof

The invention provides a semi-conductor perovskite solar cell and a preparing method thereof and belongs to the field of solar cells. The semi-conductor perovskite solar cell solves the problems that materials of an existing perovskite solar cell are high in price, and the process is complex, and meanwhile keeps the high photoelectric conversion efficiency. The semi-conductor perovskite solar cell sequentially comprises a substrate, a conducting layer, a hole barrier layer, a mesoporous electron collecting layer, a mesoporous hole collecting layer and a mesoporous back electrode layer from bottom to top. The preparing method of the semi-conductor perovskite solar cell comprises the steps of preparing an electrode region, the hole barrier layer, the mesoporous electron collecting layer, the mesoporous hole collecting layer, the mesoporous back electrode layer and light-absorbing materials filled with perovskite. According to the semi-conductor perovskite solar cell, a mesoporous insulating layer is additionally arranged, and the step of preparing the mesoporous insulating layer is added to the preparing method. The semi-conductor perovskite solar cell solves the problems that the materials of the existing perovskite solar cell are high in price, and the process is complex, and open-circuit voltage, short-circuit current and fill factors of the cell are increased.
Owner:HUAZHONG UNIV OF SCI & TECH
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