Apparatus and method for preventing a white-screen error in a liquid crystal display device

摘要

A system and method for preventing a white-screen error in a liquid crystal display (LCD) device operates by detecting an output voltage signal from a DC/DC converter and reducing a time delay between the output voltage signal and a data signal for the LCD gradually by a fixed value until a timing problem between the output voltage signal and the data signal is overcome. A software reset is executed when the time interval between the output voltage signal and the data signal is too great, causing the output voltage signal to shut down before the data signal is turned on. The process is repeated until the timing is proper such that the output voltage signal is detected to remain when the data signal is output. If the time delay is reduced to a predetermined threshold, then it is determined that a malfunction has occurred, and an alert is provided to a user.