Semi-Auto Jig For LCD Testing

• Main Author: Rahim, Norhafiza
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi Petronas 2004
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://utpedia.utp.edu.my/8675/1/2004%20-%20Semi-Auto%20Jig%20for%20LCD%20Testing.pdf; http://utpedia.utp.edu.my/8675/

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.