And now the micro-projectors are becoming more and more portable and intelligent, and they have more and more similar functions to smart TVs. In addition to large-screen presentations, LED micro-projectors usually have Internet access, games, 3D, and Wifi. And other features. So what do you need to pay attention to when choosing a smart projection?
The key parameters of the smart projector are mainly expressed in four aspects: brightness, contrast, color saturation, and brightness non-uniformity.
Say brightness first. In general, many people buy projections only to see the brightness, the importance of visible brightness. What is the parameter of this brightness? This brightness refers to the projector's luminous flux, the unit is lumens. Many manufacturers will say how many lumens they have when they promote their products. In fact, this is the brightness of the projection.
It is a key indicator to measure the merits and demerits of the projector's light engine and its overall performance. The projector with ample brightness has a clear picture, beautiful colors, and a low dependence on ambient light. Otherwise, the picture is dark and the picture quality is blurred.
But do not think that the higher the lumen, the better, the high projection brightness will directly stimulate the human eye during playback, easier to form visual fatigue. And generally home projector 1500-3000 is enough, and higher brightness will increase the cost.
In addition to brightness, contrast is also an important parameter for selecting a projection. In general, this contrast ratio is the black and white ratio projected on the smart projector screen, from black to white gradient levels. The larger the contrast ratio, the more gradient levels from black to white, and the more detailed the picture will be.
Many people think that the contrast of the projector is not important. In fact, this is ambiguous. Because the home projector is mainly used for watching movies, in order to be able to fully express the details of the film, you need a projector with a strong level of expression, that is, outstanding black and white performance.
The nominal contrast ratio of most current LCD projectors is around 400:1 (ANSI), and the nominal contrast of most DLP projectors is above 1500:1 (full white/all black). The higher the contrast, the higher the projector price.
Color saturation is also one of the important criteria for checking projectors. Color saturation is a numerical expression of the purity of a single color, so in theory, the higher the color saturation, the higher the purity of a single color and the more beautiful the color.
The color saturation of this smart projector refers to the color depth or vividness of the light projected by the projector. This depends on the white light in the color. The higher the white light, the lower the color light and the lower the color saturation. The value is a percentage, between 0 - 100%.
However, this color saturation is also the best medium, high color saturation brings gorgeous color accumulation, is more dazzling to the user, but also depends on the user's personal preferences for color performance.
The last brightness non-uniformity is the inhomogeneity of the entire projected image on the "brightness" index or the "color" index. The main reason for testing it is the structure of the projector itself.
The light source for the general projection is a light bulb inside the machine, and the light of the light bulb is divergent, so when the light source is shining on the object, there is a phenomenon that the central area is bright and the surrounding area is slightly dark. This phenomenon cannot be avoided, so we need to test this aspect of the projection.
However, this parameter also has a certain reference index. The projector center heterogeneity score is less than 1.5 and it is acceptable. When it is less than 1.2, the human eye is almost imperceptible.
In addition to these machine's own parameters, it also needs to consider its system and touch parameters. As a smart projection, the system is also a consideration. After all, this is a home. Complex system operation is not used with the whole family.
The touch function is to test the sensitivity of the projection, say remote control, Bluetooth signal range is certainly better than the infrared.
Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, TV boxes, smart TVs, smart TV software, etc. Answering questions.
2.54MM Pitch Signal Power Connector
2.54MM Pitch Signal Power Connector.Chip power connector is used in power module system. It can select the matching power + signal connector according to the need. The feature is that the number of power and signal contacts and the matching sequence can be selected arbitrarily while keeping the connector size and contact core number unchanged.
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2.54MM Pitch Signal Power Connector
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