Allwinner H3 TFT LCD display 40 pins
You can't. (At least, not without ugly workarounds like adding an HDMI switch and a HDMI to TFT decoder.) The Allwinner H3 is designed as a TV set-top box controller; it only supports HDMI and CVBS (composite video) output, so it cannot drive an LCD directly.

Some of the other parts in the Allwinner SoC family, especially in the "A" series, do support LCD output. Whether they will be appropriate for your needs is for you to determine.