Touch Screen Car DVD should be added to the system, involving a number of complex issues, the need for engineers to spend a lot of time to solve. We are listed in the following areas: 1. Familiar with the touch screen of the working principle and control circuit; 2. As the external environment (temperature, humidity, power fluctuations) changes need to add touch-screen control Adaptive circuit; 3. The development of touch-screen coordinate transformation algorithm; 4. The development of error coordinates filtering and smoothing algorithm; 5. The development of DVD system and touch-screen control chip of interface; 6. The development of touch-screen coordinates calibration and storage of the algorithm; 7. The original system hardware interface needs to re-planning and the control software requires a large amount of modification; 8. Part of the circuit re-wiring so that to increase the new hardware circuit; If you want to a stable design that any of the above can not be overlooked. Which each a small point not only have to be an engineer to spend 1-2 weeks at least, but also can not guarantee stability. Under normal circumstances to spend a total of more than 3 months is normal for the time. This upgrading of the product development cycle is not acceptable, and the replacement of a machine, it also needs a considerable amount of development and testing cycle. |