Controller and control method for liquid-crystal display panel, and liquid-crystal display device

1. A liquid-crystal display device comprising:

a liquid-crystal display panel having signal lines and scanning lines;

a data driver which drives the signal lines;

a gate driver which drives the scanning lines; and

a timing controller controlling a display timing of image data to be displayed on the liquid-crystal display panel,

the timing controller comprising:

a data enable signal detection circuit which detects a data enable signal applied to the timing controller; and

a timing generating circuit which controls the display timing on the basis of the data enable signal detected by the data enable signal detection circuit, said start timing of display being independent of horizontal and vertical synchronizing signals externally supplied, said liquid-crystal display device having only a display timing control mode in which the display timing is responsive to the data enable signal, without having another display timing control mode in which the display timing is independent of the data enable signal.

2. The liquid-crystal display device as claimed in claim 1 , wherein the timing generating circuit comprises a first circuit which generates, from the data enable signal, a first start pulse which starts driving each of the data lines, and a second circuit which generates, from the data enable signal, a second start pulse which starts driving the scanning lines.

3. The liquid-crystal display device as claimed in claim 1 , wherein the timing generating circuit comprises a circuit part which detects a beginning of each frame on the basis of the data enable signal.