Design Of Liquid Crystal Display Research Articles

8‐2: Invited Paper: High Mobility Top Gate Self‐alignment Oxide TFT Technology for 14.5 inch 3K*2K Narrow‐bezel Notebook LCD

We have developed a high mobility over 20 cm2 /V•s Top Gate Self‐alignment (TGSA) Oxide TFT technology with on‐state current 60μA. The TGSA TFT with dual gate have two electron channel realizing the higher mobility than single gate TFT. The higher mobility make it possible for high resolution, high refresh rate and narrow‐bezel design of LCDs. Therefore, combing with the source line DEMUX 1:2 circuit design, we fabricated a 14.5 inch notebook liquid crystal display (LCD) with resolution of 3K*2K successfully using the high performance TGSA TFTs, achieving the refresh rate of 165Hz and panel left and right border of 1.7mm.

P‐5.4: Analysis of Low Power Consumption Design of LCD in Circuits and Signal Transmission

Liquid crystal display (LCD) is widely used in notebook computers, TVs, and PC monitors. Its performance, including panel contrast, panel refresh rate, and panel resolution, has made great breakthroughs in recent years. In the context of continuously improving functions, the power consumption of LCD is gradually increasing, especially the LCD that need to be applied to portable devices, which need to maintain superior performance while maximizing working endurance.A current low power consumption determination method is that the power consumption is less than 1w when the panel brightness is 150nit, the refresh rate is 48Hz, and the transmission mode is eDP1.3 or higher. We have produced a 13.3‐inch LCD with a backlight power consumption of 621mW and a panel logic power consumption of 372mW totaling 0.996W, which meets this requirement.This article analyzes the circuit and signal transmission, mainly exploring the limit setting of IC in LCD, the high‐efficiency design method of LED Driver IC under the condition of lower current load, and the communication method between Tcon IC and Source Driver IC. Perform targeted optimization at the circuit design to achieve the purpose of reducing LCD power consumption.

Line‐time optimization technology for ultra‐large and high‐resolution liquid crystal displays

AbstractThis paper proposes a line‐time optimization (LTO) technology for ultra‐large and high‐resolution liquid crystal display (LCD) televisions. Line‐time optimization enables a single‐bank data driver configuration without severe image degradation. When the proposed method is applied to an ultra‐high‐definition (UHD) LCD with a single‐bank data driver scheme, the LCD performance comparable to that of a dual‐bank data driver method can be obtained. The implementation of the proposed method helps in achieving desirable goals such as a reduction in the number of drivers and realization of a much more flexible design of UHD LCDs.

New three-gamma-curves-integrated VA LCD design for excellent image quality and enhanced transmittance

ABSTRACTCompared with the in-plane switching (IPS) mode of the liquid crystal display (LCD), the vertical-alignment (VA) LCD mode provides an excellent contrast ratio and a fast response time, but it still has a relative weakness: image quality deterioration as a function of the viewing direction. In the VA mode, the pixel division method, in which two different gamma curves from the divided pixels are integrated, is generally used to improve the off-axis image quality. Reported herein is the new VA mode for enhancing the off-axis image without decreasing the transmittance. The pixels divided into 12 domains instead of 8 using double electrode layers produce three different gamma curves from the high, middle, and low pixels, which are combined and enhance the image quality. In this pixel structure, the middle pixels are formed by two electrode layers and produce the third gamma curve. The new design of the VA mode shows the best off-axis image quality in the VA mode, which is the most comparable with that in the IPS mode, even with the organic light-emitting diode, and will provide a solution for the heavy competition in the ultrahigh-definition (UHD) and large-LCD-TV-panel market in the very near future.

Approach to analytically minimize the LCD moiré by image-based particle swarm optimization.

In this paper, we proposed a methodology to optimize the parametric window of a liquid crystal display (LCD) system, whose visual performance was deteriorated by the pixel moiré arising in between multiple periodic structures. Conventional analysis and minimization of moiré patterns are limited by few parameters. With the proposed image-based particle swarm optimization (PSO), we enable a multivariable optimization at the same time. A series of experiments was conducted to validate the methodology. Due to its versatility, the proposed technique will certainly have a promising impact on the fast optimization in LCD design with more complex configuration.

Design and Implementation of LCD Based on FPGA

Liquid crystal display (LCD) is one of the most dynamic electronic products in this century. It has been recognized as a key component of media era, since it has many characteristics, such as a low operating voltage, light volume, and excellent performance of full color display, and suitable for LSI drive and the like. In order to break the limitations of LCD, improve its animation display performance as multimedia television monitor, and strongly simplify the manufacturing to ensure the competitiveness on price, we designed a LCD module with the liquid crystal cell of TD-EDA experimental system based on FPGA, and achieved the control of LCD with hardware description language VHDL in this paper. The validation results of compiled program downloaded on programmable logic devices after compiling and simulating show that the LCD we designed can run correctly and relatively perfectly.

Design of Digital Advertising Screen Display

Design of LCD(liquid crystal display) screen system based on DSP has been put forward. There are two parts of the hardware interface circuit and the software design about whole system. Chinese characters, characters and graphics can be displayed in the LCD system. The result of simulation shows that the system can effectively solve the drive and display of LCD based on DSP and can save resources for I /O port. This design will offers a certain reference value for a variety of display terminal design of the portable system. The simulation shows that the system can realize the basic expected goal.

P-96: Design of Liquid Crystal Displays with 10000: 1 Contrast Ratio over ±85° Viewing Cone

A computer simulation model based on oblique angle Jones matrix and Poincaré sphere is developed for optimizing the design of film-compensated multi-domain vertical-alignment liquid crystal display (VA-LCD). According to this design, a contrast ratio higher than 10000:1 is predicted over the entire ±85° viewing cone for the four-domain VA-LCD. Potential application for LCD television is emphasized.