【 Weak current College 】 defects no undetected and projector on-site commissioning of four skills---Power By 【 China power house network 】

To determine the selected models, on-site power conditions, how to vote through the screen to identify actual indicators of projector? today as we provide a few tips to test the quality of the projector projection techniques, you may wish to purchase the projector when the actual application debugging.

1. check the horizontal scan tracking frequency range according to the specifications given on the horizontal scan frequency range, choose high, medium, low three frequencies, calculate the three frequency corresponds to the image resolution. Check the projector in the three resolutions, whether or not to display properly. 　　If rows are not synchronized, namely screen twist or jitter, explains horizontal scan tracking bad. 2. check the focus performance with projector homegrown test box, or signal generator, computer-generated test box, will focus to the best position, move the image contrast changes from low to high, the observation of the horizontal and vertical grid lines for defocus phenomenon. 　　If Yes, then the focus performance. 3. check the video bandwidth video bandwidth directly affect the video details section. Use a computer or signal generator generates a projector can achieve the maximum resolution of white base graphics signals, watch the screen of a minimum graphics is clear. If the projector's video bandwidth is low, the indicator line on the screen of a real and imaginary vertical line of the image detail. LCD projector onsite check out an all white image, the observation of color uniformity. In General, liquid crystal color uniformity of speculation is very difficult to achieve a higher standard. 　　But quality projector color uniformity relatively better. 4, dustproof performance plus, LCD projector dust is a problem, a very small dust, such as falling into LCD panels or glass, you may zoom in very clear. In an all white image, from small to large adjustment optics focus, watch the screen if any color spots appear, you may be a flat plate or lenses on and off the dust, it is estimated that the machines have problems anti-dust system.