In this chapter, we present a method to analyze the image-sticking phenomenon of the liquid crystal display (LCD). Image-sticking phenomenon is one of the severe problems that deteriorate image quality of not only LCD but also other display systems such as OLED and CRT. First, we have categorized the main factors of the image sticking and then simulated the proportion of these factors by using the experimental data. We expect that this method of analysis can be utilized to understand the basic mechanism of the image sticking and to solve the chronic problem of LCDs.

Chapter Contents:

• 7.1 Introduction to image sticking
• 7.2 Driving scheme of TFT-LCD
• 7.3 Cause of image sticking
• 7.3.1 Pretilt angle
• 7.3.2 Residual DC
• 7.3.3 Voltage holding ratio (VHR)
• 7.4 Transmittance change after aging
• 7.5 AC and DC image sticking
• 7.5.1 Transmittance dependence on Vcom voltage
• 7.5.2 Separation of AC and DC image sticking
• 7.6 Image sticking due to δR-DC
• 7.7 AC Image sticking due to δpretilt
• 7.8 AC Image sticking due to δVHR
• 7.9 Improvement of image-sticking characteristics
• 7.9.1 δVHR improvement
• 7.9.2 δR-DC improvement
• 7.10 Conclusion
• Acknowledgments
• References

Inspec keywords: image processing; optical images; liquid crystal displays

Other keywords: image quality; LCD; image-sticking phenomenon; liquid crystal display

Subjects: Computer vision and image processing techniques; Display technology; Optical, image and video signal processing; Image processing and restoration; Liquid crystal devices