OTP burning and upper/lower-limit voltage detecting system of liquid crystal display module

An OTP burning and upper/lower-limit voltage detecting system of a liquid crystal display module comprises a multi-channel power conversion circuit, an MCU control system, a relay switching circuit controlled by the MCU control system, and a to-be-tested liquid crystal display module testing slot. The multi-channel power conversion circuit provides a back-light power supply, a lower-limit working voltage, a normal working voltage, an upper-limit working voltage, an OTP burning voltage and a relay working voltage; and one part of I/O ports inside the MCU control system is used for controlling the relay switching circuit, and the other part is used for communicating with tested liquid crystal display module components in the to-be-tested liquid crystal display module testing slot. Compared with the prior art, the system has the advantage that the system not only can detect performance parameters of the liquid crystal display module under a standard working voltage, but also can detect performance parameters of