Advertising display screen size is one of the important indicators of the display, we often hear the argument is that the horizontal angle of view is greater than 120 °, vertical viewing angle greater than 120 °, then which affect the advertising LED large screen perspective factors?
First, the use of LED large screen perspective:
LED large screen selection of the maximum viewing angle of 120 °, straight viewing angle of 60 °, oval LED indoor large screen selection of the level of straight are 120 °, and some high-rise on the big screen on the high demand for straight view.
Second, LED advertising big screen perspective Category:
1, normative. Usually for the indicator light, the half-value angle of 20 ° ~ 45 °.
2, high directivity. Usually in a pointed epoxy package, or with a metal reflective cavity package, without the addition of scattering agent. Half angle of 5 ° ~ 20 ° or less, with a high directivity, can be used as part of the lighting source, or with the photodetector in order to form an automatic detection system.
3, scattering type. This is a large angle of view of the light, half-value angle of 45 ° ~ 90 ° or more, the amount of scattering agent.
Third, the LED perspective on the display screen brightness uniformity of the impact: Because of the advertising screen their own perspective, LED screen brightness will change with the changes in the survey point of view, affecting the display screen display. Investors from the same point of view to watch the display screen, the brightness of the changes will have a negative impact on the LED display brightness.
Summary: LED screen viewing angle and brightness are opposed to each other. In the practice of full-color large-screen use, through the LED luminous intensity distribution curve can simulate the LED large screen brightness uniformity and observation of the relationship between the use of objective evaluation criteria to complete the evaluation can only be carried out by the human eye can be estimated Out of the best viewing scale.