Advanced liquid crystal displays with supreme image qualities

Chen, Haiwei

doi:10.1080/1358314x.2019.1625138

Cited by 27 publications

(13 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The display section of the circuit consists of a Liquid Crystal Display (LCD). The liquid crystal display [13] used is the HD44780 LCD. Its displays the time as rendered by the real time clock (RTC) and also performs the user interface function.…”

Section: Display Circuitmentioning

confidence: 99%

Design and Implementation of Access Door Control with Mo-bile Alert

Nwogu

Eze

Okunbor

2020

IJET

View full text Add to dashboard Cite

The necessity for adequate security of lives and properties cannot be overemphasized. Tackling insecurity in an effective manner calls for active computer-based researches and solutions. Essentially a security system is designed to help detect intrusion and prevent unauthorized access. These security threats are tracked by installing various security access doors and alarm systems. Findings have shown that many access doors use either password or biometric form of authentication separately which are easily compromised. This paper presents a two level automated access control for door security with mobile alert system, powered by a 5V, 6000mAH battery. In addition a multi factor authentication using biometrics (fingerprint) and password was also used to enhance access control for this system. A mobile phone call alert and alarm system was uniquely included to this design to notify owners of the presence of an intruder when multiple attempts of incorrect login credentials are presented to the system over a short period of time. The program for the microcontroller was written in C language. This paper concluded that the use of multi factor authentication with mobile phone call alert will help improve the security for access doors used in banks, residential buildings, hospitals, military properties and other institutions and where confidentiality and restrictions are needed.

show abstract

Section: Display Circuitmentioning

confidence: 99%

Design and Implementation of Access Door Control with Mo-bile Alert

Nwogu

Eze

Okunbor

2020

IJET

View full text Add to dashboard Cite

show abstract

“…Although organic light emitting diodes (OLEDs) are widely used for transparent display, their poor luminance and expansive cost due to multi-layered thin film structure and current driven method make them difficult to utilize in this area. Among many display technologies, liquid crystal displays (LCDs) can be designated as a promising candidate for transparent displays because of low cost and long lifespan with extremely high infrastructure from a perspective of the manufacturing [1]. Conventional LCDs require two polarizers, which lead to a significant deterioration in light efficiency (7~5% dropped by crossed polarizers).…”

Section: Introductionmentioning

confidence: 99%

P‐116: Student Poster: Transparent Displays Using Vertically Aligned Polyimide‐Free Liquid Crystal‐Polymer Composite

Lee

Kang

Kim

et al. 2022

Symp Digest of Tech Papers

View full text Add to dashboard Cite

In this work, we propose a normally transparent polymer‐networked liquid crystal (PNLC) mode to use as a transparent display with energy saving, high contrast ratio, easy manufacturing process (Polyimide‐free). In this system, we adopt a homeotropic alignment material (HAM), which serves as both vertical alignment inducer and photopolymerizable reactive mesogen (RM). With no polarizers, the ground state shows clear transparency, and applying voltage induces an opaque scattering state successfully. By using double‐sided UV irradiation strategy, we can minimize hysteresis on voltage‐dependent transmittance. we believe the proposed concept will open a way to reach a novel transparent display with high transparency.

show abstract

“…Currently, the liquid crystal display (LCD) is widely used in various applications such as smartphones, monitors, cameras, and other devices [ 1 , 2 , 3 ]. In order to drive the device, the liquid crystal (LC) molecules must be controlled by the applied voltage [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of TiO2-Embedded Polyimide Layer with High Transmittance and Improved Reliability for Liquid Crystal Displays

Son

Choi

et al. 2021

Polymers

View full text Add to dashboard Cite

Construction of liquid crystal (LC) alignment by introducing polyimide (PI) to indium tin oxide (ITO) electrodes is one of the main methods to realize high-resolution images in liquid crystal displays (LCD). However, the loss of transmittance caused by the difference in refractive index between ITO and PI leads to direct degradation of LCD performance. Thus, we herein fabricated a functional hybrid PI alignment layer that reduces the difference in refractive index and greatly increases the transmittance of the device by introducing inorganic titanium dioxide (TiO2) nanoparticles (NP) to the organic PI. The highly refractive TiO2 NPs were surface-treated with stearic acid comprising long alkyl chains to improve their dispersibility and uniformly dispersed in the PI matrix by simply stirring the mixture. The hybrid PI mixture was spin-coated on the ITO substrate, and the resulting LC cell exhibited excellent electro-optical properties. In addition, the reliability of the LC cells was enhanced by the inclusion of the TiO2 NPs, which was confirmed through the evaluation of voltage holding ratio, residual direct current, and LC cell reliability. Overall, functional hybrid PI can be used in advanced display technology for next-generation LC devices that require high transmittance and reliability.

show abstract

Advanced liquid crystal displays with supreme image qualities

Cited by 27 publications

References 43 publications

Design and Implementation of Access Door Control with Mo-bile Alert

Design and Implementation of Access Door Control with Mo-bile Alert

P‐116: Student Poster: Transparent Displays Using Vertically Aligned Polyimide‐Free Liquid Crystal‐Polymer Composite

Fabrication of TiO2-Embedded Polyimide Layer with High Transmittance and Improved Reliability for Liquid Crystal Displays

Contact Info

Product

Resources

About