DLP seamless splicing screen display system dust protection is very important, life, our common computer, the accumulation of dust, directly affect the operation of the computer, so, like the bulky dlp screen, dust is more important, everyone As we all know, large-screen movements use a large number of optical components, and dust is harmful to the optical components, so the protection of large screens against dust is critical. Dust can have a lot of impact on it, as shown in the following 4 points:
1, color wheel damage
The rotation speed of the color wheel is quite high, about 7200 rpm. If the dust protection is not good, dust accumulation will gradually adhere to the wheel, causing unbalanced rotation of the wheel, which is similar to the general principle of body vibration caused when the wheels of a car are not balanced. The color wheel will hurt the motor by vibration, and it may also cause the color wheel to decrease in speed or instability, causing a malfunction.
2. Decrease in brightness
When the environment is seriously dusty, the brightness may be reduced by more than 40% within half an hour. Generally, the reflectance of a new reflective lens has a specification of 98% or more, and the lens has a permeability law specification of more than 97%. These requirements are high to obtain high values. The efficiency of the output brightness, when dust protection is not good, the dust accumulates on the surface of the optical components, reflectance and transmittance will decrease with time, resulting in decreased brightness.
3, the decline in contrast
The definition of contrast is that the maximum brightness value output by a large-screen display unit is divided by the darkest brightness value. When the scene is dark, dust on the optical components reflects stray light, and the light that should not be projected from the lens is projected. , increase the brightness of the dark part. The same part of the light in the bright part will be blocked by the dust, reducing the amount of reflection and transmission of light, and lowering the brightness value of the bright part. This will naturally decrease the contrast.
4, sharpness decreases, the image becomes blurred
The reason for the decrease in sharpness is the change in the refractive index of the optical component. When the surface area of ​​the lens or lens is dusty, that is, there is an irregular material with an irregular refractive index on the surface of the lens, resulting in a change in the path of the light, the focus is not in the same focal point, and the imaging becomes blurred.
1, color wheel damage
The rotation speed of the color wheel is quite high, about 7200 rpm. If the dust protection is not good, dust accumulation will gradually adhere to the wheel, causing unbalanced rotation of the wheel, which is similar to the general principle of body vibration caused when the wheels of a car are not balanced. The color wheel will hurt the motor by vibration, and it may also cause the color wheel to decrease in speed or instability, causing a malfunction.
2. Decrease in brightness
When the environment is seriously dusty, the brightness may be reduced by more than 40% within half an hour. Generally, the reflectance of a new reflective lens has a specification of 98% or more, and the lens has a permeability law specification of more than 97%. These requirements are high to obtain high values. The efficiency of the output brightness, when dust protection is not good, the dust accumulates on the surface of the optical components, reflectance and transmittance will decrease with time, resulting in decreased brightness.
3, the decline in contrast
The definition of contrast is that the maximum brightness value output by a large-screen display unit is divided by the darkest brightness value. When the scene is dark, dust on the optical components reflects stray light, and the light that should not be projected from the lens is projected. , increase the brightness of the dark part. The same part of the light in the bright part will be blocked by the dust, reducing the amount of reflection and transmission of light, and lowering the brightness value of the bright part. This will naturally decrease the contrast.
4, sharpness decreases, the image becomes blurred
The reason for the decrease in sharpness is the change in the refractive index of the optical component. When the surface area of ​​the lens or lens is dusty, that is, there is an irregular material with an irregular refractive index on the surface of the lens, resulting in a change in the path of the light, the focus is not in the same focal point, and the imaging becomes blurred.
Guangzhou Jointair Co., Ltd. , https://www.jointairaccessories.com