if we test the display horizontal or vertical light disibution characteristics, and test images for large area (greater than the sampling range of measuring insuments) the same gray-scale image, then: b (θ) = i (θ) / cotheta; (2) the above two methods, the method (b) because the display closer to practical applications, so it is more use of the indusy. at present, china is using indusy standard sj/t11281 the test method. also, from equation (2) we can conclude: in order for led displays with light features b (θ) = 1 (ie the brightness does not vary with the observer's point of view changes), the led light disibution characteristics of an ideal cosine function should be (including horizontal and vertical direction). 2. led display with brightness and optical properties and uniformity of analysis is usually associated with a particular size we are talking with optical properties of led is the average of the standard led light disibution characteristics, and specific to the individual specifications of led ( even with the same specifications, the same batch), between individuals with different optical properties is a large difference.
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writing boardthis requires ambient lighting must be designed to have leakage protection and a good grounding system. the choice of the equipment must meet safety standards for protection, consuction and must be sictly in accordance with specifications to ensure elecical safety. 3.3 rule of reason: environmental lighting design should be based on environmental characteristics of various types of landscape to be the same style, design and reasonable. decorative landscaping during the day, proper lighting at night to avoid the blind spot (dark areas) to prevent light pollution. for example, the fiftieth anniversary this year, a lot of beautiful works in the installation of lantern ceremony, the beautiful lights by changing people's favorite, also brought joyful atmosphere. however, individual lamp too close to the installation location away from residential buildings, forming a light pollution, affecting the lives of nearby residents. poles within the disict from the residential building is too high or too close to the optical interference caused to the residents.
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