lcd panel test factory

In the past decade, LCD monitors have replaced CRT screens for all but the most specialist applications. Although liquid crystal displays boast perfect

OptoFidelity GoldenEye is an automated display test system that is scalable and capable of producing reliable and consistent display quality data. It is capable of testing MURA / MURA detection, uniformity but as well particles within display stack and display surface dust detection. The OptoFidelity™ GoldenEyE software is used with different camera and hardware setups and integrated to RD and factory testing environments. You can read more details about the solution from OptoFidelity™ GoldenEye solution page.

When considering the details of display inspection, there are challenges involved in controlling the ambient lighting environment, viewing distance, impact of pixel size variations between products, dust and particles on top of the display surface, and excessive operator handling that itself is a risk for panel breakage. Display inspection also involves lighting on the display and checking optical qualities such as luminance uniformity and color performance. Other Interesting functional defects include missing lines, light leakage, particles within the display stack and flickering. These light-on inspection steps often require a specific test setup, and the inspections are usually very time-consuming.

The OptoFidelity ™ GoldenEye display test solution is used in a lab environment for RD purposes, and mass production lines for high-volume production quality assurance. In a lab environment, the GoldenEye display inspection tool can be used to check the display quality of small sample batches and receive timely data of display quality. The setup is simple:

In a production environment, the GoldenEye display testing solution is packaged into an automated or semiautomated, stand-alone tester or inline system according to customer requirement. The HW setup will be carefully designed to meet customer requirements and allow high-quality performance of the tool. Fine-tuning will be performed by OptoFidelity, and on-site support with hands-on instructions is an integral part of customer service. OptoFidelity is committed to working closely with customers to bring the testers to the factory floor or clean room environment.

As an example, the OptoFidelity team has helped a customer in the process of fine-tuning inspection criteria and defect analysis parameters based on operator judgement results. By aligning the tester output with the traditional operator output, the GoldenEye display test solution can avoid excessive false positive results. The fine-tuning of defect analysis parameters can also be done by the customer, as tuning can be performed simply with existing data without the need for re-measurement. Another example is the usage of the GoldenEye display inspection tool sensitivity map feature. When a customer display product had darker edges as an inherent optical defect, the sensitivity map was used to ignore these areas. It was easy to implement as well as an effective solution to treat every display panel equally. The beautiful thing was that the sensitivity map did not just mask away those areas; it actually has a thresholding feature: Only the defects exceeding a pre-defined threshold will be reported.

If you are interested to hear, how we apply test robotics with display testing in order to measure curved displays, please have a look on our OptoFidelity™ GoldenMovtest robotics platform website or from youtube .

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If the screen abnormality is not present in the built-in self-test mode, see the Dell knowledge base article How to Troubleshoot Display or Video Issues on a Dell Monitor.

If the LCD built-in self-test (BIST) diagnostic test passed, the laptop LCD screen is working correctly. The display problem could be due to an outdated graphics driver or incorrect video settings. Follow the troubleshooting instructions in the Dell knowledge base article How to Troubleshoot Display or Video Issues on a Dell Laptop.

If the screen abnormality is not present in the built-in self-test mode, see the Dell knowledge base article How to Troubleshoot Display or Video Issues on a Dell Monitor.

If the LCD built-in self-test (BIST) diagnostic test passed, the laptop LCD screen is working correctly. The display problem could be due to an outdated graphics driver or incorrect video settings. Follow the troubleshooting instructions in the Dell knowledge base article How to Troubleshoot Display or Video Issues on a Dell Laptop.

To clean the anti-static screen, we recommend using a special screen-cleaning tissue or solution that is suitable for the anti-static coating on LCD panels.

While moving the monitor, follow the instructions as described in the User Manual on how to hold the monitor. Do not put pressure directly on the LCD screen as it may cause irreparable cracks.

To run a diagnostic test on the LCD panel of a Dell laptop, see the Dell knowledge base article How to Run the LCD Built-in Self-Test on a Dell Laptop.

If the screen abnormality is not present in the integrated self-test mode, see the Dell knowledge base article How to Troubleshoot Display or Video Issues on a Dell Monitor.

Running a self-test feature check (STFC) or the built-in self-test (BIST) diagnostic on a Dell monitor is always a good practice to isolate LCD or monitor issues.

If the self-test feature check (STFC) or built-in self-test (BIST) diagnostic test passed, this indicates that the Dell monitor is functioning normally. To troubleshoot the display or video issue, see the Dell knowledge base article How to Troubleshoot Display or Video Issues on a Dell Monitor.

The QuickTest™ II+ performs rapid statistical Qualification and QC testing on cell phone displays, hand-held displays, and other small format LCD and OLED displays. QuickTest™ II+ is a successor to our QuickTest™ system which is installed at LCD manufacturing facilities world-wide.

In the past, Qualification and QC testing of cell phone displays often involved a dark room laboratory with optical instruments mounted on home-made fixtures. The testing was labor intensive and took too long to acquire significant statistical data. This resulted in very long test times for qualification testing and limited QC verification. With its  integrated instruments, display drive, and powerful software, QuickTest II+ makes rapid qualification testing and QC testing possible!

This text is part of the Bridgemate internal test mode. To exit this test mode, press the following four keys in this order on the first screen that appears after activating the Bridgemate:2

If your Bridgemate does not show this screen, but the first visible screen after activation is "Press OK to test LCD", then press these four keys on this screen:

One host machine + extension test flex cable to easily test the display and touch functions of Phone 6S/6SP/7/7P/8/8P/X/XS/XS Max/XR/11/11 Pro/11 Pro Max/12/12 Pro/12mini/12 Pro Max