The present disclosure provides method for controlling a message signal within a timing controller integrated circuit, the timing controller integrated circuit and a display panel. The method includes: receiving a low voltage differential signaling signal; decoding the low voltage differential signaling signal to obtain a transistor-transistor logic RGB data signal and a control signal, wherein the control signal comprises: a start signal, a horizontal synchronization and a vertical synchronization; processing the transistor-transistor logic RGB data signal to obtain an input RGB data; controlling a timing of the start signal before a timing of the input RGB data; and processing the input RGB data to obtain a mini-low voltage differential signaling data. Therefore, the technical scheme provided by the present disclosure has an advantage of the low cost.