Details:
Brief Description Car DVD with touch screen controls are very humane, and is the general trend. China-made touch-screen control with the matching circuit is already very mature and low price , just to meet the needs of the market. Our design is the most humane approach, the most low-cost, at least on the original system changes on the touch screen can be added to the original systems. Our program will serve as vehicle of choice for DVD developers.
Analysis 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;
TS9638 is a new generation of touch screen controller chip, and its characteristics including:
1. 10bit (8-bit physical precision+2bit software precision ) accuracy A / D conversion.
2. Built-in a powerful environment adaptive control circuit.
3. Built-in a powerful error message filtering and smoothing algorithm.
4. Built-in a coordinate transformation algorithm.
5. Built-in a Coordinate information calibration memory interface.
6. Can simulate the remote control data send format.
7. The chip is lower than the market price of all the dedicated touch-screen control of the chip, with absolute competitive advantage.
System components:
The system falls into Software development platform and hardware system.
We designed a very friendly touch screen private development platform offer to user. This software platform is composed of two parts.
1. Learning remote control and setting the system
a. System design engineers will be using the system remote control with the code value displayed on the screen with the location of the key input in the development of software.
b. System design engineers to develop software used to generate "production monitoring system" software.
2. Production Monitoring System
a. Production line workers in accordance with the monitoring system prompt testing, touch-screen calibration.
b. The test is completed, the system will set the data write into the touch-screen control card.
Hardware part is composed of two major chip: TS9638 and 93c46.
Email: semicon@188.com
Web: www.wwteq.com
