1, the appearance of spherical LED screen is should be one of the people's needs and the pursuit of novel and strange appeared products.
In the early years, such as LED display a large plane appears on the square, that people will be surprised: such a big TV set!
These 'big TV' has now can't satisfy people's curiosity.
If one day, the square of a diameter of 5 meters on outdoor LED spherical screen, it will be a very gathered popularity of a product.
So it is a novelty gathered popularity of the product.
All use graphic video source in three dimensional spherical played on the defect will be tolerated, like using a wide-angle lens or fish-eye camera take pictures of the deformation of the accepted by people.
2, LED display screen play principle is: LED display control system (
The controller + PC)
Will play on the computer screen image source to plane LED display screen display.
All the source image in the world are almost flat, if you would have a flat image source up to three dimensional spherical LED screen display, and not treated, it is almost impossible.
Fortunately, the ball is round, any individual audience could not see the LED ball every corner of the screen at the same time, he can only see the ball on the surface of a fraction.
This is also related to the diameter of the ball screen, if the diameter of the ball screen is large, its effective attention probably only about one 6 of the surface of the ball,
Because of the Angle of view)
Is invisible, including five 6 or not its attention, because this five 6 respectively is, is on the left, on the back of the ball is on the right side, above and below.
In this way, can play methods are: 1)
The six different image source in six different areas of the sphere.
The three different image source in three areas of the spherical (
Such as left, right, after the former)
The two image source in two areas (
After the right front, on the lower left)
Of course can also be like the watermelon spherical LED screen will be a flat image source in the whole sphere.
3, LED the spherical design and graphic LED display screen resolution, which is closely related to the viewing distance of LED display, general experience is P2.
5 m outside watching, P6 6 m outside to watch, so P20 outdoor screen, so watch outside the 20 m, but the same is true in the real use, this is a vague choice, is qualitative, not quantitative, it as follows: based on LED display and computer screens, they are made as to number shown in the image of each pixel is made up of red, green, and blue colors yuan.
There is a certain distance between pixels and the pixels, the distance we call point spacing of PH.
Set computer screen resolution of 1024 x 768, horizontal direction of the monitor screen of a computer with 1024 pixels, the vertical direction with 768 pixels.
The pictures it enough to express a fine enough.
If the physical size of the monitor screen of a computer the size of the vertical direction to 300 mm, so the pixel spacing on the monitor screen of a computer PH = 300/768 = 0.
39 mm, Ph is any digital display is an important parameter.
We detected: the human eye to the distance from the monitor screen of a computer for D = 450 mm, then the two adjacent two pixels with an Angle of theta, the human eye is theta = Arctg0 equation.
If we put the computer screen in 30000 mm from the operator, and will be used by the computer screen with LED display or LED spherical screen, then the human eye to LED display screen or LED the spherical distance is 30000 mm.
Thus, in order to ensure the image pixels to perceive the same amount (
Unchanged or resolution)
, so the Angle theta also should be the same.
The only need to change the Ph change.
According to the equation (
A equation: theta = Arctg0.
39/450 = ArctgPh / 30000 + 450, obtained the Ph = 26 mm left and right sides, namely we will LED the pixel pitch design of spherical screen for 15 ~ 20 mm, the ball screen resolution at this time is enough, and is reasonable.
When we see from 30 meters LED ball screen image resolution in front of the computer to see effect is the same with us.
If the person and the distance of spherical LED screen for other values, its Ph value can be calculated by reference to the above method.