MIPI is primarily used for data transmission between the display module and an application IC or between the camera module and an application IC. D-PHY was previously adopted as the MIPI standard, but the majority of D-PHY subsystems that are used in commercially available smart phones consist of one clock lane and three data lanes. Meanwhile, it has become necessary to transmit a massive volume of data at high speed due to increasingly high-resolution displays and cameras. Moreover, because smart phones cannot be made larger, it has also become important to reduce the amount of wiring.
Against this background, the introduction of C-PHY, which is high speed and able to reduce the number of lanes, is advancing in the latest smart phones.