Gene
Member
Believe a lot of friends in the purchase of projectors always very confused, where to check, how to check is effective? Here are a few things to check when you buy a projector.
1. Check the horizontal scanning tracking frequency range of the projector
According to the frequency range of horizontal scanning given on the technical index, we can select the three frequencies of low, medium and high, and calculate the corresponding image resolution of these three frequency points respectively. Check whether the projector can display normally at these three resolutions. If the line is out of sync, that is, the picture wiggle or shake, it indicates that the horizontal scan tracking is not good.
2. Check the focusing performance of the projector
How to check the focusing performance of the projector? We adjusted the projector lens to focus, changed the image contrast from low to high, and observed whether there was defocus in the horizontal and vertical lines of the square. If there is, then the focus performance is poor.
3. Check the video bandwidth
The video bandwidth directly affects the details of the video, and a computer or signal generator is used to generate a white background graphic signal with the resolution that a projector can achieve, so as to observe whether the smallest character graphics on the screen are clear or not. If the video bandwidth of the projector is insufficient, the horizontal line displayed on the screen is more solid, while the vertical line is empty and the image details are blurred.
That's how to check and choose a projector. I hope it will help you.
1. Check the horizontal scanning tracking frequency range of the projector
According to the frequency range of horizontal scanning given on the technical index, we can select the three frequencies of low, medium and high, and calculate the corresponding image resolution of these three frequency points respectively. Check whether the projector can display normally at these three resolutions. If the line is out of sync, that is, the picture wiggle or shake, it indicates that the horizontal scan tracking is not good.
2. Check the focusing performance of the projector
How to check the focusing performance of the projector? We adjusted the projector lens to focus, changed the image contrast from low to high, and observed whether there was defocus in the horizontal and vertical lines of the square. If there is, then the focus performance is poor.
3. Check the video bandwidth
The video bandwidth directly affects the details of the video, and a computer or signal generator is used to generate a white background graphic signal with the resolution that a projector can achieve, so as to observe whether the smallest character graphics on the screen are clear or not. If the video bandwidth of the projector is insufficient, the horizontal line displayed on the screen is more solid, while the vertical line is empty and the image details are blurred.
That's how to check and choose a projector. I hope it will help you.
