Touch Screen Program

Our program are putting aside traditional design ideas，and on the TS9638 mature in our touch-screen control chip are specially aim at Car DVD system-specific characteristics of the optimized that designed the world's first dedicated car DVD touch screen control system. The 1-7 points listed above both through our control circuits to complete. If the use of our control card, the 8th point can be omitted absolutely. Development engineers need to spend half an hour of time to acquaint themselves with the development of the system then we can easily to complete a design. Engineers can not write any code, do not change any of the circuit, will be able to increase the existing system of touch-screen control.

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.

 

Car DVD both has a remote control receiver port. The point of touch screen touch control for the final directive will become a task of the system implementation, and is very similar to remote control. TS9638 is through simulation remote control command to the point will touch of touch screen to change into a control command.

Car DVD system engineers dedicated to the development of the touch screen software which the relationship between the set of touch screen point and the remote control of instruction. In the production process, workers through the production monitoring software will coordinate Correction and set good parameter settings write into the touch-screen control card.

DVD system is explained the remote control code as usual and complete tasks designed. As a result of the original system did not add any tasks, it almost does not require any major changes to the original system can be a normal work. .

 

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. TS9638 is responsible for main work, 93C46 is responsible for setting all kinds of information storage.

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.