Zhejiang Xinda factory kind Showcase preferred time

Showcase physical characteristics due to its ease of use and versatility, multimedia teaching in the country has been more widely used, from the development trend of the past two years to see, each a multimedia classroom projector + a kind Showcase The model is almost accepted mainstream configuration. However, in the usual procurement, since on the one hand the projector in the whole procurement funds heavily weighted share, on the other hand the lack of objective evaluation parameters or standard physical booth performance, so often overlooked concern for the physical booth, make wrong purchasing decisions. So, how to choose a good cost-effective physical booth is placed in an issue before us. From the product's core components look Imaging Component CCD: CCD camera is one of the core components of the video booth, we determine the image quality of the merits; the world's CCD chip is mainly produced in Japan, and is recognized as the best quality; the same CCD sensor camera production costs accounted for a large part, what the CCD sensor performance as well as the cost structure of the product have a fairly large impact on Japan sensors usually cost higher than other product areas. We have many domestic manufacturers of physical stand point of view, the emphasis on product quality and performance of most companies use Japanese company SONY CCD, and more manufacturers consider the cost of the majority of South Korea's CCD chosen product. From the outside to see uniformity of product performance imaging lens: We can notice different kind Showcase product image uniformity is different, and a high quality physical Showcase products generally have good uniformity, whether it is looking Focus with the focus or look away near the edge of the lens center is basically the same, there is no significant difference. And some bad quality products, you can clearly see the focus, the edge is not very significant real sense, it will seriously affect the results of the product. Contour pincushion distortion: Figure 1 is a standard rectangle, Figures 2 and 3 are actions that occur after pincushion distortion: pincushion distortion obvious booth usually optics choice grade is not enough, seriously affecting the booth use of effects. Uniformity of illumination: Stand no more than two common forms of lighting, bilateral lamp or single lamp. Unilateral lighting compared to bilateral lighting, usually more obvious uneven illumination phenomenon, but we also note that a Japanese JVC AV-P820C single lamp, the use of design grating, uniform illumination degree compared to other single-lamp products have been greatly improved. As for the bilateral lamp lighting, due to conflicting sidelight range of activities, so that different products demonstrated differences still exist, especially for smaller-range side light physical activity booth at the show there will be little significant physical the problem of insufficient lighting. Color reproduction: Stand for images or text performance is equally important, however, showcase some bad quality products, in order to make up for lack of text Showcase performance capabilities, and significantly improve the contrast black and white, this result would make the sacrifice booth a gray-scale and color performance capabilities. In the actual purchase process, we can compare each character stands for performance capability and colorful pictures of reducing capacity; different brands of China-made products, even on the domestic market, the two most important imported brands are also considerable differences in performance. Stability of product use: Different brands of products due to the choice of different levels of components and quality assurance system, product quality and stability during use and the failure rate is different in the procurement process need to refer to other users batch reflect branded products. There are many activities booth components, it is crucial to stability. For example, Japan's JVC brand, although the price of imported goods other than similar price is slightly higher, but the product excellent performance, good stability and low failure rate, taking into account the purchase cost of the product, cost and other factors, it would be a good Select, which is our domestic many colleges and universities as a major factor has been the brand of choice for JVC physical booth. Additional features of the product selection: Physical booth and basically is a kind of two-dimensional or three-dimensional video output device by amplifying device to an audience. And many products in order to increase the product's selling point, added a lot of additional features not practical, and this part of the additional functionality is destined to increase the cost to consumers of the shift. As to whether the selection of these additional features, it is necessary to see if these features users have practical value. And for those with a lot of additional features, while the price but lower than other products when we should watch out, if these products from the core part of reducing grade components and reducing costs due.