Thermal transfer for flat‐panel‐display manufacturing

Abstract— Photolithography is currently the predominant patterning method in the flat‐panel‐display (FPD) industry. Thermal lithography is a novel approach offering superior process control, a completely dry process, and considerable cost savings. Thermal imaging is now the dominant imaging method in computer‐to‐plate applications in the printing industry, with over 6000 installations world‐wide. Two applications, in which this technology could be applied in the FPD industry, will be discussed in detail: color filters for liquid‐crystal displays (LCDs) and barrier ribs for LCDs and organic light‐emitting‐diode (OLED) displays.     

汽车导航仪中显示器的选择与应用

根据汽车导航仪的要求,选择液晶显示器作为显示部件,对液晶显示器的原理和特点进行了详细的分析,给出了液晶显示器的两种连接方案。对各自的控制原理和实现时注意的问题作了详细的讨论。最后,对未来将要应用于汽车导航仪中的显示部件进行展望。     

Direct dry film optical bonding ‐ A low‐cost,robust, and scalable display lamination technology

Abstract— A robust, repeatable, low‐cost lamination process that utilizes pressure‐sensitive adhesive (PSA) to directly bond substrates to displays, such as LC, OLED, plasma, and electrophoretic displays, has been developed. These substrates can vary in intent and serve as protective covers, reflection mitigation, heaters, filters, touch screens, environmental barriers, etc. The resultant assembly is very rugged (shock, impact, and vibration resistant), while maximizing optical performance. This paper briefly describes the traditional liquid bonding technologies and compares them to dry‐film bonding. A section of the paper focuses on the enhanced optical and environmental performances of dry‐film bonded displays. This paper may also serve as a brief review of optical‐bonding technologies.     

Development of a 14.1‐in. UXGA TFT‐LCD using LTPS technology

A 14.1‐in. UXGA low‐temperature poly‐Si TFT‐LCD has been developed using p‐MOS technology. Both the peripheral driving circuits and the pixel switches are implemented using only p‐channel TFTs. The device performance for the driving circuits and the panel design issues, such as crosstalk and flicker, were investigated. The image quality required for the notebook‐PC display has been achieved by optimizing the panel design and by improving the device performance. In addition, the redundant gate driving structure has been developed to minimize the degradation of the panel yield.     

Single-polarizer reflective twisted nematics

Abstract— A general expression for the reflectance of a single-polariser twisted-nematic device is given. From this, solutions of liquid-crystal parameters that will convert linear-to-circular (L-C) and linear-to-linear (L-L) polarizations are derived. A comparison of the field behavior for some normally black and normally white devices made from the lower Δnd/λ solutions of the L-C and L-L are presented. The effect of doping on normally white devices is considered.     

LCD宽视角化技术的进展

综合介绍了改进ＬＣＤ视角特性的几种主要方法，简要介绍了它们的原理、工艺特点和改进效果，并对每种方法的优缺点和应用前景作出评述。     

Improved representation of polarizers for LCD modeling

Abstract— Dichroic sheet polarizers required for most liquid-crystal displays are generally modeled as simple uniaxial films. This leads, however, to significant errors in display modeling at high viewing angles, both in luminance and spectral transmission. The primary source of these errors appears to be a negative out-of-plane birefringence (on the order of 50 nm for sample polarizers) of the protective outer layers of the polarizer. A straightforward methodology for measuring the relevant optical properties for modeling purposes via transmission measurements through crossed polarizers and optical microscopy is described.     

Thermal dimensional stability of glass substrates for poly‐Si TFT‐LCD application

Abstract— Thermal dimensional stability of Fusion‐drawn Corning Code 1737 glass was investigated at simulated thermal cycles for low‐temperature poly‐Si TFT fabrication. For low‐temperature poly‐Si TFT processes between 550 and 600°C, annealed Code 1737 is required to meet a typical thermal shrinkage requirement of less than 20 ppm. For super‐low‐temperature poly‐Si TFT processes between 400 and 450°C, Code 1737 meets the requirement in the unannealed state. Code 1737 glass having a high strain point of 666°C provides thermal capabilities as a substrate for low‐temperature poly‐Si TFT‐LCD applications.     

Measurement of the mechanical properties of brightness enhancement films (BEFs) for LCDs by optical interferometry

The brightness enhancement film (BEF) is one of the important components in the liquid crystal displays (LCDs). Since the thicknesses of BEFs are very less, it increases the difficulty to measure their mechanical properties. In this paper, we successfully propose a methodology by combining the micro tensile test and optical interferometry to characterize Young’s moduli and Poisson’s ratios of BEFs. In addition, the thermal and hygrothermal effects on the mechanical properties of BEFs were also investigated. The finite element analysis (FEA) was utilized to verify the precision of our proposed methodology. The results show that Young’s moduli of BEFs are influenced by temperature and humidity whereas Poisson’s ratios of BEFs are less influenced by temperature and humidity.     

Method to improve color reproduction on a 120‐Hz two‐field color‐sequential LCD

Conventional displays use at least three primaries for full‐color image reproduction. In this contribution, the reproduction of color images using an LCD system with two local dynamic primaries, based on a segmented backlight, will be discussed. The two primaries are chosen to minimize color error by means of total least squares. Simulation results indicate quite good color reproduction for a large set of video data even with a limited number of backlight segments. A statistical analysis of this video content shows that excellent color reproduction (?u′v′ < 0.020 for more than 99.0% of the pixels per frame) can be achieved for 74.2% of the frames using 9216 backlight segments.