35results about How to "Good projection quality" patented technology

The invention discloses a zoom projection lens, which is used to make original image which is at image source side project on image side to form projective image, a projective system of the zoom projection lens sequentially comprises a first lens group with negative diopter, a second lens group with positive diopter, a third lens group with positive diopter and a fourth lens group with negative diopter and a fifth lens group with positive diopter from the imaging side. When the zoom projection lens changes from the amplifying end to the shrinking end, the first lens group and the fifth lens group are firmly fixed, and the second lens group, the third lens group and the fourth lens group all move towards the imaging side; the zoom projection lens can meet special condition so as to improve the projection quality. The zoom projection lens also comprises an automatic light ring which can move along with the fourth lens group together.

The invention provides an ultra wide-angle lens. The lens comprises: a first lens group possessing a negative focal power, a second lens group possessing a positive focal power, wherein the first lens group comprises a first spherical lens, a second spherical lens and a third spherical lens which are successively arranged from an object side to an image side; the first spherical lens, the second spherical lens and the third spherical lens are the negative, negative and positive focal powers respectively; the second lens group comprises a fourth spherical lens and a fifth spherical lens which are successively arranged from the object side to the image side; the fourth spherical lens and the fifth spherical lens are the positive and negative focal powers respectively. The ultra wide-angle lens satisfies the following conditions: 0.01< D / | FG1|<1 and 2<D / FG2<4, wherein D is a distance from an object side surface of the first spherical lens to an imaging surface of the ultra wide-angle lens along an optical axis direction; FG1 is an effective focal length of the first lens group and FG2 is the effective focal length of the second lens group. By using the ultra wide-angle lens which satisfies the above conditions, a projection quality is high and costs are low.

A projector includes a light source, an optical engine module, and a projection lens. The light source is configured for providing an illumination beam. The optical engine module includes a light valve, a casing, and a heat conducting structure. The light valve is configured to convert the illumination beam into an image beam. The light valve has a front portion and a rear portion opposite to each other. The casing is connected to the front portion. The heat conducting structure is disposed on the casing and at at least one side of the front portion. The projection lens is disposed on the casing and configured to project an image. The heat conducting structure is configured to dissipate heat of the casing and the front portion of the light valve.

The present invention discloses zooming projection lens capable of installing in projection display device. Zooming projector lens includes first lens assembly having negative dioptre and second lens assembly having positive dioptre, wherein first lens assembly consisting of plurality of lens near by image surface and capable of moving along optical axis, second lens assembly consisting of plurality of lens near by object plane and capable of moving along optical axis, one aperture stop set between two adjacent lens of second lens assembly, said aperture stop capable of moving along with second lens assembly, said zooming projector lens capable of correcting aberration, thereby raising projection quality.

An optical system for projection display is composed of a light source, a lighting module for receiving the light from light source and outputting the linearly polarized white light, a color selecting module for receiving said white light and outputting three color light beam with respective polarities, a prism assemblage, a projecting lens, and three reflection-type light valves for said three color beams.

The invention discloses a stone curtain wall crossbeam-free suspension system. The system is characterized in that the system comprises a hanging seat which is detachably connected to a vertical mainkeel, the hanging seat comprises a vertical swing plate, a hanging part is anchored by a stone panel through a back bolt, and the hanging part is suspended on the swing plate. The stone curtain wall crossbeam-free suspension system has advantages that 1, due to freeness of curtain wall transverse sub-keels, transverse sub-keel discharging operation is avoided, and accordingly processing period isshortened; 2, by taking full advantages of curtain wall panel vertical plates, curtain wall main material consumption is reduced, and material cost is reduced; 3, transverse sub-keel mounting in onsite construction procedures is avoided, so that a construction period is shortened; 4, easiness in standard, modularized and industrial processing and production is achieved; 5, fine adjustment in horizontal and vertical directions through bolts can be realized, and convenience in operation is achieved.

The invention relates to a combined narrow-edge framework device. The combined narrow-edge framework device comprises a main framework, an external decoration rack and a plurality of elastic components, wherein the main framework is a rectangular framework mainly comprising two transverse frame rods and two longitudinal frame rods which are combined with four L-shaped angle connectors and a plurality of screws, the external decoration rack comprises two transverse decoration rods and two longitudinal decoration rods and is fixed at an outer side of the main framework by a plurality of screws,the main framework is used for supporting a projection screen, tension forces are provided for a surrounding edge of the projection screen by a plurality of elastic components hidden between the mainframework and the external decoration frame, so that the projection screen is smoothly expanded. In the combined narrow-edge framework device, the composite structure formed by combining the main framework and the external decoration framework has favorable mechanical strength, the width of the framework can be appropriately reduced to show a narrow-frame shape, and the problems that the projection screen framework device with a rough and wide framework is excessively large in wide, is heavy and is poor in attractiveness are solved.

The invention discloses an intelligent office control system based on the Internet of Things. The intelligent office control system comprises a cloud platform, an edge computing server layer, an edgecontrol layer and a basic scene layer. The cloud platform and the edge computing server layer communicate with each other to realize data interaction and whole-process tracing; the edge computing server layer and the edge control layer communicate with each other to obtain various equipment data of the edge control layer, process and analyze the equipment data, and send out a control signal for equipment in the basic scene layer; the edge control layer and the basic scene layer communicate with each other to obtain data of equipment in a basic scene, so that the equipment in the basic scene iscontrolled; and the basic scene layer comprises a control module of each area in the office environment. According to the intelligent office control system based on the Internet of Things, general equipment control on the edge side is achieved based on the Internet of Things, real-time control and remote control over the office environment and equipment can be achieved, expandability is high, andremote control is convenient.

The invention provides a unit-type vertical guardrail system. The unit-type vertical guardrail system comprises a plurality of frames fixed to a terrace, wherein a plurality of guardrail plates are fixedly supported in each frame, and the frames and the guardrail plates are fixed to the terrace through combination supporting pieces; the combination supporting pieces comprise unit stand columns connecting the guardrail plates and the terrace, upper hanging bases supporting the guardrail plates and lower hanging bases supporting the guardrail plates; and the unit stand columns are provided withhanging piece supporting the upper hanging bases or / and the lower hanging bases in a combination mode. According to the unit-type vertical guardrail system, a novel and environmental-friendly fabricated system with convenient installation and implementation and outstanding economic benefits is provided.

A construction method for preventing airport pavement from producing crack and crushed stone from shedding is characterized by that it uses asphalt and aggregate, and mixes them into asphalt concrete and makes it into precast strip; and its construction method includes the following steps: repairing crack, melting and infiltrating solvent into recess to form connecting surface, closing crack and sticking rubberized tape to cover crack, filling precast strip, and compacting, and making the precast strip and connecting surface into one integral whole, filling expansion joint with gap-filling adhesive, melting, infiltrating and closing the crack, preventing production of water-penetrating gap, renovating surface layer of airport pavement, welding covered crack and expansion joint so as to effecively prevent airport pavement from producing crack and crushed stone from shedding.

The invention provides a tunneling machine and a construction method thereof. The tunneling machine comprises a tunneling machine body, a traction pulling point is arranged on the tunneling machine body and connected with a traction rope, the traction rope penetrates through a to-be-tunneled area, and the traction rope is connected with traction equipment at a receiving end. The construction method comprises the following steps that the positions, corresponding to a starting end and the receiving end, of the traction pulling point are measured and positioned; the traction rope is sent from thereceiving end to the starting end; the traction rope is connected with the traction pulling point and the traction equipment; and the traction rope performs traction and deviation rectifying on the tunneling machine body. The tunneling machine and the construction method thereof have the advantages that the jacking distance of the tunneling machine is increased, the number of relay wells is decreased, and investment is saved; the jacking control difficulty of the tunneling machine is reduced, more devices and methods are provided for deviation rectifying of the tunneling machine, constructionprecision is improved, and the engineering quality is improved; and the foundation of the construction precision of the tunneling machine is improved, the assembly precision between unit pipe jointsof a 'CC' construction method is improved, and the joint quality and the waterproof effect of the pipe joints are improved.