Position:The projector product on the market from many, different product standards is not identical also, face Lin Lin always total umbriferous technology standards, a lot of consumer have the feeling that have a blurred vision, choose and buy when more do not know place from. The norms that decides projector function is main resolution of brightness, contrast, physics, among them above the administrative levels feeling that contrast basically expresses umbriferous now picture, tall to be being jumped over quite, a moment of indication color scheme can achieve bright and gorgeous result.
At present of the projector on the market nominal contrast has prep above 5000: Of 1, also have under 500: Of 1, both between have nearly 10 the difference of times, what cat dirt is there between this after all? It is important that the contrast of projector has many after all? What difference does the projector contrast of different technique have again?
Contrast is the ratio of the brightest picture and the dismallest picture, say the ratio that is white picture and black picture simply. Its specific value is greater, from black to white luminance contrast administrative levels of gradual change of more intense, gray scale also is abounded more, can obtain more keen, more exquisite subjective visual perception to suffer; When showing chromatic picture, can achieve bright and gorgeous result. Contrary, if contrast is inferior, the brightness trends range that explains its show a system is narrow -- white is insufficient bright this, black is not quite deep, picture gray scale is centered in a lesser limits, have the feeling of kind of dusky, lack detail expression.
Projector contrast respect begins to appear now a dynamic contrast, its value can be achieved very tall, this namely on the market 5000: The projector of 1 contrast why so much reason. Dynamic contrast originates liquid crystal demonstrates a skill, core train of thought is to carry the back that adjusts flat liquid crystal luminous intensity or it is to adjust the smooth pupil bulk of liquid crystal projector will control smooth output. It is with projector exemple, this product real time statistic the brightness information of each image (be like brightness trends limits) , be based on above statistic information to decide to enlarge Guang Tong or contractible Guang Tong. The flow control that Guang Tong is equivalent to faucet -- Guang Tong is bigger, smooth output is big; Guang Tong is smaller, smooth output decreases. In dark setting, the smallest brightness of primitive image and poor value of the biggest brightness are lesser, namely brightness trends range is narrow. Below this kind of circumstance, magnify through narrowing Guang Tong is mixed primitive signal, can control effectively already umbriferous the light to screen, dynamic limits that also can enlarge data processing, can promote at the same time contrast and drop point of dark field a confusion of voices, obtain more outstanding black to behave.
Previous12 Next
Related Articles
