Semi-Auto Jig For LCD Testing

LCD is normally used in laptop computers, digital clocks and watches, microwave
ovens, CD players and many other electronic devices and they offer some real
advantages over display technologies. In a radio application, the LCD is used to
display the function of the radio as possible as the menus to run the radio functions.
Normally, manufacturer plugs in the LCDpanel on the radio to display the required
segment by using theLCDdriver. Thesegment displays can be viewed as they press
the radio button or keypads. Repeating job like plug in the LCD onto- the radio
panel brings lots of problems. This testing method is not productive because of the
time taken to plug in the LCD and take it out from the radio panel is too long. There
will be side damage as we will re-assemble the radio panel after testing the LCD
panel. The purpose to build the jig is to check the segment display on the specified
LCD. The testing procedure should be handled in easier way in order to test the
segment displays. The literature review consists of the fundamental theory of each
related topic involved in this project. The topics involved are related to LCD
applications, PIC programming, Visual Basic Programming and also circuit
simulation using tools available. Serial communication between the serial port and
user interface allow user to send the signal to each of the LCD pitch. Software In
implementing this project, there are several main processes taken. The project is
divided intro three parts which is hardware part or LCD tester jig, user interfacing
and serial communication. The circuit is designed to send out the signal to turn on
the LCD segment display controlling. In the "Testing History" the result test is
recorded according to number of testing done, date, time, total LCD passed, total
LCDrejectedand also total LCDtested. The jig is able to check the segmentdisplay
as required. User can assemble the LCDon the jig without continuous side damage.
The testing window can help user to implement the LCD checking with a smooth
testing flow. It also reduces the time takento implement this LCD checking.