How to solve the problem of distortion related to
2021-04-13
Many friends of projection engineering companies will encounter such problems when installing and implementing projection display projects, when the projector projects the computer signal, there is color distortion, text icon ghosting, tailing, etc., the main reasons for this situation are: (1) VGA cable is too long, and the general VGA cable transmission distance is 0-30 meters away; (2) The quality of the VGA cable selected for the project is too poor, and the cables used to transmit computer signals on the market are 3+4VGA, 3+6VGA, and 75-2VGA. (3) There are too many contacts, and some projection projects in which the VGA cable is transferred through multiple links, such as through the central control, distributor, selector, matrix, etc., which will inevitably consume the high-frequency signal of VGA, and the welding of the VGA connector itself is not standardized enough or has burrs, so it is easy to have image ghosting and tailing.
As a solution provider specializing in large-screen projection display peripheral products, Booz Technology Co., Ltd. has always paid attention to the dynamic development of the industry, and launched the BS-RGB192 long-line driver, which is a professional solution to the long-distance transmission of computer video signals using VGA cables. The output device (such as projectors, plasma displays, liquid crystal displays, etc.) displays color distortion, image and text ghosting or tailing caused by too many contacts. Since the VGA signal will be attenuated after long cable transmission, especially the high-frequency part, at the beginning of the cable, high-frequency compensation and emphasis processing is adopted, and the high-bandwidth op amp circuit with a bandwidth of up to 300MHz is used to boost the VGA signal at high frequency. The stepless RGB tricolor is used for high-frequency compensation and brightness compensation respectively. The attenuated signal on the line is intentionally amplified so that the entire signal band is completely restored, thus eliminating tailing. The VGA signal transmission distance reaches 50 meters to 130 meters, which can fully meet the various long-distance VGA signal transmission.
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