Search results

1 – 10 of 296
Article
Publication date: 8 February 2008

C.A. Smith

The purpose of this paper is to discuss the chemistry of organic compounds with a liquid crystal phase and their application in flat panel electronic displays.

1660

Abstract

Purpose

The purpose of this paper is to discuss the chemistry of organic compounds with a liquid crystal phase and their application in flat panel electronic displays.

Design/methodology/approach

The paper is a review of liquid crystal display (LCD) technology. It provides an introduction to liquid crystals and LCDs, with an emphasis on their historical development, various LCD technologies employed, their electronic interconnection to driver circuitry and failure analysis.

Findings

The current world market for LCDs is being driven by flat panel television sales. As well as their use in television sets, they are to be found in aircraft cockpit instrumentation, computer monitors, mobile phones and digital cameras, all of which would not exist in their present form without liquid crystals.

Originality/value

The paper provides an introduction to LCDs for electronic engineers working in this area, who may be unfamiliar with the chemistry of liquid crystals, LCD technology, electronic interconnection and failure analysis.

Details

Circuit World, vol. 34 no. 1
Type: Research Article
ISSN: 0305-6120

Keywords

Article
Publication date: 1 January 1998

Michael Pecht and Chung‐Shing Lee

Summarizes the flat panel display (FPD) industry outside of Japan, with a focus on advances in Korea and Taiwan. Discusses the major manufacturers in each country as well as their…

Abstract

Summarizes the flat panel display (FPD) industry outside of Japan, with a focus on advances in Korea and Taiwan. Discusses the major manufacturers in each country as well as their current status. Concludes with a brief discussion on the future outlook of the FPD market.

Details

Circuit World, vol. 24 no. 1
Type: Research Article
ISSN: 0305-6120

Keywords

Article
Publication date: 11 April 2016

Yonghee Cho and Tugrul Daim

Due to rapid technological evolution driven by display manufacturers, the television (TV) market of flat panel displays has been fast growing with the advancement of digital…

1679

Abstract

Purpose

Due to rapid technological evolution driven by display manufacturers, the television (TV) market of flat panel displays has been fast growing with the advancement of digital technologies in broadcasting service. Recently, organic light-emitting diode (OLED) successfully penetrated into the large-size TV market, catching up with light-emitting diode (LED)-liquid-crystal display (LCD). This paper aims to investigate the market penetration of OLED technologies by determining their technology adoption rates based on a diffusion model.

Design/methodology/approach

Through the rapid evolution of information and communication technology, as well as a flood of data from diverse sources such as research awards, journals, patents, business press, newspaper and Internet social media, data mining, text mining, tech mining and database tomography have become practical techniques for assisting the forecaster to identify early signs of technological change. The information extracted from a variety of sources can be used in a technology diffusion model, such as Fisher-Pry where emerging technologies supplant older ones. This paper uses a comparison-based prediction method to forecast the adoption and diffusion of next-generation OLED technologies by mining journal and patent databases.

Findings

In recent years, there has been a drastic reduction of patents related to LCD technologies, which suggests that next-generation OLED technology is penetrating the TV market. A strong industry adoption for OLED has been found. A high level of maturity is expected by 2026.

Research limitations/implications

For OLED technologies that are closely tied to industrial applications such as electronic display devices, it may be better to use more industry-oriented data mining, such as patents, market data, trade shows, number of companies or startups, etc. The Fisher-Pry model does not address the level of sales for each technology. Therefore, the comparison between the Bass model and the Fisher-Pry model would be useful to investigate the market trends of OLED TVs further. Another step for forecasting could include using industry experts and a Delphi model for forecasting (and further validation).

Originality/value

Fisher-Pry growth curves for journal publications and patents follow the expected sequence. Specially, journal publications and patents growth curves are close for OLED technologies, indicating a strong industry adoption.

Article
Publication date: 5 May 2015

Soo-Woo Kim, Ho-Yong Choi, Sehyuk An and Nam-Soo Kim

– This paper aims to design the circuit for electromagnetic interface (EMI) reduction in liquid crystal display (LCD).

Abstract

Purpose

This paper aims to design the circuit for electromagnetic interface (EMI) reduction in liquid crystal display (LCD).

Design/methodology/approach

The cascode level shifter and segmented driver circuit are applied in LCD column driver integrated circuit (IC) for EMI reduction. Cascode current mirror is used in the proposed level shifter for DC voltage biasing and reduction of the driving current which passes through the level shifter. The on-off switching currents and transient times are measured and compared between the conventional and proposed level shifters. Additionally, a segmented data latch is obtained by the timing spread solution in data latch, and applied to split the large peak switching current into a number of smaller peak current. The timing spread-operation does not actually reduce the total power of the noise, instead, it spreads the noise power evenly over the frequency bandwidth. The optimal number of latch is dependent on the operating frequency and EMI allowance. The column driver IC and clock controller are integrated in 0.18 μm CMOS technology with 1-poly and 4-metal process.

Findings

The post-layout simulation shows that the proposed column driver circuit for LCD driver IC significantly reduces the peak switching current, and it results in the reduction of EMI noise level by more than 15 dB. It is obtained with 20 segmented operations in data latch at 40 MHz frequency.

Originality/value

The advantage of the cascode current source is that it can provide a well-controlled bias current with an accurate current transfer ratio. To reduce the EMI noise in LCD driver circuit, the cascode current source is properly located for the DC bias block in the level shifter. The application is rarely done by others, and a significant EMI noise reduction is found. The well-controlled current source provides a high performance switching in the level shifter.

Details

Microelectronics International, vol. 32 no. 2
Type: Research Article
ISSN: 1356-5362

Keywords

Book part
Publication date: 13 March 2013

Dong-Joon Lim, Neil Runde and Timothy R. Anderson

This chapter illustrates the Technology Forecasting using Data Envelopment Analysis (TFDEA) process on Liquid Crystal Display (LCD) performance characteristics from 1997 to 2012…

Abstract

This chapter illustrates the Technology Forecasting using Data Envelopment Analysis (TFDEA) process on Liquid Crystal Display (LCD) performance characteristics from 1997 to 2012. The objective of this study is to forecast future state-of-the-arts (SOAs) specifications as well as to diagnose past technological advancement of the LCD industry. Appropriate characteristics were determined from a group of LCD technologists. Data was gathered from public databases and outlying data points were cross-referenced as a validity check. The TFDEA process is defined and its application to the dataset is described in detail. The results not only provide information on how LCD industry has evolved but also provide an insight on future NPD targets.

Article
Publication date: 1 April 1988

Mark Bendig

One of the most distinctive features of the M310 Workstation is the 16‐character blue‐on‐blue liquid crystal display (LCD) panel mounted at a 45‐degree angle on the front of the…

Abstract

One of the most distinctive features of the M310 Workstation is the 16‐character blue‐on‐blue liquid crystal display (LCD) panel mounted at a 45‐degree angle on the front of the system unit. One reason it's at that angle—aside from aesthetics—is that it can be read equally well (or poorly) with the system unit mounted in a vertical position. Normally, the LCD panel displays the time of day and the current processor speed setting (8 or 12.5MHz; see DOS‐tips). The last character position is used as a disk drive access indicator, so you will see letters appearing there: C when it accesses the hard disk, A when it accesses a diskette (in drive A), etc. In addition, Wyse has provided a special DOS command, LCDPANEL, which allows you to control the LCD panel. Let's look at some of the options LCDPANEL provides.

Details

OCLC Micro, vol. 4 no. 4
Type: Research Article
ISSN: 8756-5196

Book part
Publication date: 26 June 2007

Kazuo Ichijo

Sharp Corporation, established in 1912, has always tried to identify unique niches that its competitors do not enter, while at the same time continuing to pursue innovation and…

Abstract

Sharp Corporation, established in 1912, has always tried to identify unique niches that its competitors do not enter, while at the same time continuing to pursue innovation and knowledge creation in those niches. The liquid crystal display (LCD) business is a typical example of Sharp's strategy and innovation. Sharp developed the first successful LCD product – a pocket calculator with a small black and white LCD in 1973 – and since then the company has released a series of unique products with LCDs, including PDAs and camcorders. In 1998, in the face of increasing competition in the traditional cathode-ray tube (CRT) TV market, Katsuhiko Machida, the company's new president and strategic leader, announced his vision of upgrading all bulky CRT televisions sold in the domestic market to flat screen LCD sets by 2005. This vision was bold, since Sharp was the first producer of color CRT TVs and its business was still profitable at the time. However, Machida as strategic leader, predicted tough price competition in the CRT business in the future and began to mobilize Sharp's employees to gain and sustain competitive advantage in the new market.

Details

Being There Even When You Are Not
Type: Book
ISBN: 978-6-6110-4908-9

Article
Publication date: 1 October 2001

Chiaki Tsuzuku

Today, most of the high technology products around us require high performance semiconductors, and information technology (IT) is fully utilized in these products. The IT…

Abstract

Today, most of the high technology products around us require high performance semiconductors, and information technology (IT) is fully utilized in these products. The IT revolution is due largely to the remarkable progress of semi‐conductor technology. Robots are expected to handle larger size wafers under various levels of vacuum and clean environments, in order to permit semi‐conductor manufacturing equipment to realize higher density and performance in the twenty‐first century. Twenty years have passed since liquid crystal Displays (LCD) were introduced into the market and now LCDs are used widely. LCDs, which are based on thin film transistors (TFT) have been used especially in displays for PCs, mobile telephones and digital cameras, and now recently in flat‐screen TVs. Under these circumstances, LCD device makers are enlarging the size of glass plates in order to achieve higher productivity. Along with these trends, the robots used in LCD manufacturing systems are required to cope with the market needs for enlarging the size of glass plates. This paper introduces the trend in the next generation of robot technology for the semi‐conductor and LCD industries, coping with larger wafers, higher density and larger LCD glass plates.

Details

Industrial Robot: An International Journal, vol. 28 no. 5
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 6 July 2021

Pei-Luen Patrick Rau, Jian Zheng and Zhi Guo

This study aims to investigate “immersive reading,” which occurs when individuals read text while in a virtual reality (VR) or augmented reality (AR) environment.

Abstract

Purpose

This study aims to investigate “immersive reading,” which occurs when individuals read text while in a virtual reality (VR) or augmented reality (AR) environment.

Design/methodology/approach

In Experiment 1, 64 participants read text passages and answered multiple-choice questions in VR and AR head-mounted displays (HMDs) compared with doing the same task on liquid crystal display (LCD). In Experiment 2, 31 participants performed the same reading tasks but with two VR HMDs of different display quality.

Findings

Compared with reading on LCD as the baseline, participants reading in VR and AR HMDs got 82% (VR) and 88% (AR) of the information accurately. Participants tended to respond more accurately and faster, though not statistically significant, with the VR HMD of higher pixel density in the speed-reading task.

Originality/value

The authors observed the speed and accuracy of reading in VR and AR environments, compared with the reading speed and accuracy on an LCD monitor. The authors also compared the reading performance on two VR HMDs that differed in display quality but were otherwise similar in every way.

Details

Information and Learning Sciences, vol. 122 no. 7/8
Type: Research Article
ISSN: 2398-5348

Keywords

Article
Publication date: 10 April 2019

Yan Hong, Xuechun Cao, Yan Chen, Zhijuan Pan, Yu Chen and Xianyi Zeng

The purpose of this paper is to investigate physiological indices related to comfort and health condition, based on which corresponding electronic equipment are selected and…

Abstract

Purpose

The purpose of this paper is to investigate physiological indices related to comfort and health condition, based on which corresponding electronic equipment are selected and applied. A wearable monitoring system using sensor and liquid crystal display (LCD) techniques are then designed. Sensors are used to collect and transmit recording required signals from the wearer. A microcomputer with the type of AT89C52 is used to record and analyze the collected data. LCD is applied to display the health and comfort condition of the wearer.

Design/methodology/approach

A novel wearable monitoring system for the measurement of physiological indices and clothing microclimate is proposed in this study in order to monitoring both health and comfort condition of the wearer.

Findings

The proposed system provides reference for the application of sensor and display technologies in the field of smart clothing, which can be further applied to infant and child care, health care, home entertainment, military and industry.

Originality/value

This paper, first, investigated a framework of a wearable monitoring system considering both comfort and health condition and summarized the related physiological indices. The requirements of both comfort and health condition monitoring are analyzed to select appropriate electronic elements.

Details

International Journal of Clothing Science and Technology, vol. 31 no. 3
Type: Research Article
ISSN: 0955-6222

Keywords

1 – 10 of 296