You’re probably familiar with the term ‘resolution,’ which is an indication of how clear and detailed a picture is. Resolution for projectors works in the same way. That means, the higher the resolution, the clearer and more defined the image will be. A lesser known term that you may not be as familiar with is called pixel geometry. This essentially means all of those dots that you see when looking at a projector screen or monitor. These are tiny black circles that help create a crisp, clear image by making it easier to read text and see small details.
Unfortunately, there are some factors that can cause these black dots to appear on your projectors. Or to be more specific, it often appears in smaller meeting rooms where light conditions change frequently. It might also appear in spaces with a lot of daylight coming through windows. If you think your projector has black dots, don’t worry! We have all the information you need to fix this problem and keep your images crisp and clean again.
What are Black Dots?
Black dots are known as artefacts, and they are caused by the pixel geometry being incorrect. This means that instead of showing a clean image, the black dots will appear as a result of the projector trying to interpret what colour it should display. Thus, causing a blotchy or pixelated image.
When these black dots appear, it can make it difficult to read text or see small details, which is why it is so important to fix them as soon as possible. Projector manufacturers usually have a solution to prevent the black dots appearing in the first place.
Reprojection and Black Dot Prevention
Reprojection is a useful feature on some projectors that allows them to detect the brightness of the room has changed and adjust the image accordingly. This means that if the room gets darker, the image on screen will become brighter to compensate. Similarly, if the room becomes brighter, the projector will automatically make the image darker to ensure that nothing is overexposed. This can help to prevent the black dots appearing because the projector will automatically adjust the brightness of the image to get rid of the artefacts.
However, if they do appear, there are ways to fix them. We’ll get right to it in the next section.
How to Fix Black Dots?
If you find that your projector has black dots and you don’t have a reprojection feature, there are a few things you can try to get rid of the problem.
Lens Calibration
Calibration settings are what tell the projector what colour each pixel should be. So, if the black dots are related to the calibration, you can fix them by changing the settings. Make sure you follow the instructions from the manufacturer to change the settings properly.
Although calibration of the projector settings can help to fix the black dots, you may need to change the focus and zoom of the lens as well. If you find the black dots are related to the focus and zoom of the lens, you can calibrate them using the projector remote control. Follow the instructions specific to your model to calibrate the lens properly.
Keep Your Lense Clean
If you find that the black dots appear when the projector is in a very dark room, the problem may relate to the lens. Make sure you clean the lens regularly to eliminate any dust that may be obscuring the image.
If the black dots are caused by the lens again, you will need to clean the lens as well. Dust, fingerprints, and other debris can interfere with the pixels on the projector and cause the black dots to appear. Make sure you clean your projector regularly to prevent this from happening.
Brightness Adjustment
Another thing you can do is adjust the brightness of the picture. If you notice the black dots appear when the room becomes brighter or a window is left open. You can try adjusting the brightness of the picture to get rid of the artefacts. Sometimes, the projector may be placed in a position that causes the black dots to appear when the room gets brighter. Try rotating the projector 90° to find a better position.
If you have already adjusted the brightness of the picture and the black dots are still appearing, you may need to adjust it more. Try increasing the brightness by around 10-15% to see if the black dots disappear. If these steps don’t work, you should reach out to your manufacturer to see if they can offer any more advice or if they can recommend any other solutions.
Conclusion on Why a Projector has Little Black Dots
Hopefully, this article has shown you just how important it is to get rid of the black dots on your projector. These little artefacts can make it much harder to read text and see small details, which is why it is so important to fix them as soon as possible. If you find that your projector has black dots, don’t worry! There are plenty of ways to fix the problem, and it is something most projectors experience from time to time. Follow our advice to get rid of the black dots as quickly and efficiently as possible.
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