OLED Screen Research Articles

Digital Thermometer

In this article, a prototype of a digital thermometer is shown, with the objective that students and teachers have more efficient laboratory material, reducing accidents due to the handling of high-risk materials, in the laboratory of chemistry. Because conventional thermometers have mercury in their bulb, which is toxic to humans. Thus, the personnel who use them to carry out their research and practices can reduce the risks when handling these temperature measurement instruments. In this sense, the design and construction of a box-type thermometer were carried out with 3D software. This model was chosen because it is more resistant and accessible to transport. In turn, an electronic control, programmed and controlled by an Atmega328P microcontroller, was implemented in the thermometer. This element allows more accurate temperatures to be taken since it has a temperature sensor (type K thermocouple). An OLED screen was implemented in this model, which is powered by a 9V rechargeable battery. Once the prototype was assembled, tests were carried out in the laboratory. To compare the determination of the temperature and have the certainty of its operation. With this prototype, verification and experimental tests are carried out to verify its effectiveness. It is determined that this type of equipment is functional for safely measuring temperature, using it in good practices and experiments carried out at the University.

Design of analog electromagnetic launcher based on STM32

In order to improve the accuracy of the electromagnetic launching system, this paper designs a simulated electromagnetic launching device based on STM32 MCU, which takes the steering gear pylons as the motion system, the solenoid coil as the launching system, and the capacitor as the energy storage element. After collecting data, the microcontroller controls the deflection of the pylon steering gear to adjust the launching Angle or the control transformer to adjust the launching voltage, and then controls the charging or discharging of the capacitor to provide energy for the launching device to launch the projectile. Two modes, automatic and manual, are designed. The former takes OpenMV as the target identification and ranging device, and transmits data to SCM through serial communication. The latter can be displayed on the OLED screen by entering the target position through a manual key. The launcher simulates the real electromagnetic launcher and realizes the automatic and accurate launch of the projectile.

Design and Implementation of Navi-guide Device

The device designed is a navigation guide which will help the user with turn by turn directions. At the present time, use of smartphones for the navigation support has been increased and this in turn leads to risk of accident. The navi-guide device displays step by step direction on the OLED screen. This reduces the chances of mishaps and the increases the user focus. The navi-guide app has been developed for better user interface. The rider will have to just connect his phone to the device via bluetooth can safely reach his destination without any distractions with the aid of this device.

Design and Implementation of Navi-guide Device

The device designed is a navigation guide which will help the user with turn by turn directions. At the present time, use of smartphones for the navigation support has been increased and this in turn leads to risk of accident. The navi-guide device displays step by step direction on the OLED screen. This reduces the chances of mishaps and the increases the user focus. The navi-guide app has been developed for better user interface. The rider will have to just connect his phone to the device via bluetooth can safely reach his destination without any distractions with the aid of this device.

A Review on Webbased Classroom Surveillance and Attendance Monitoring System Using Biometric

Attendance has become more important part for any organizations/institutions. Recording and monitoring of class attendance is an area of administration that can require significant amounts of time and effort in a school/university environment, largely due to the amount the time required in conferences to obtain the long-term maintenance requirement increases the difficulty of this task and is very time consuming. For this reason, an efficient system is designed. This using a fingerprint sensor and all recordings are stored on a computer server. Fingerprint sensors and OLED screens are placed at the entrance of each class room. In order to mark the presence, the student must place their finger on the fingerprint sensor. On identification student’s attendance record is updated in the database and he/she is notified through OLED screen. For the administration you need all fixed equipment and special staff. Furthermore, an automated system replaces the manual system.

Light-Controlled Gap-Type TFT Used for Large-Area Under-Screen Fingerprint Sensor

In the fierce market competition of different biometric methods in smartphones, where consumers are pursuing a high screen ratio, optical fingerprint recognition under OLED screen is a well-established approach. However, using thin-film transistor (TFT) technology to make large-area optical sensors generally has the issue of low sensitivity, which will make the signal difficult to be read out. In this paper, we propose to use gap-type TFT with high photosensitivity current and process compatible with display panels as the sensing device to build the sensing array. The pixel circuit can be simplified to structure containing only of two thin-film transistors (TFTs). Using this gap-type TFT sensing array under OLED panel for fingerprint recognition is proven to be effective by the clear images captured with the readout system.

Design of monitoring system for intelligent windows based on cloud platform

With the development of Internet of Things technology, the intelligent window is entering people’s lives. There are many intelligent window products in the market, but most of them are costly or functions-limited with insufficient consideration of intelligence and humanization. Therefore, an intelligent window monitoring system based on Alibaba Cloud is introduced in this paper. This product can be automatically controlled according to environmental changes or manually controlled using the APP/infrared remote control. The indoor situation is displayed on the mobile phone and OLED screen in real-time, so that people can always grasp the situation and make correct judgment and operation in time. The product has a wide scope of applications. It is suitable for most families, rich in functions, more humanized, and has certain practicality.

Diseño e Implementación de un Sistema Bifrecuencial Basado en Láseres de Baja Potencia

El presente trabajo describe el diseño e implementación de un sistema bifrecuencial que puede ser usado como alternativa para el tratamiento de enfermedades en la boca mediante la irradiación de luz láser de baja potencia. El sistema es un prototipo, cuyo diseño mecánico es creado en un software de uso libre para luego ser impreso en un modelo 3D el cual alberga toda la parte electrónica y óptica. En cuanto a la parte electrónica, se monta sobre varios módulos los cuales cumplen diferentes funciones como son: el cargador de la batería, convertidores de potencia, drivers para los disparadores, una pantalla OLED que muestra información de los sensores, todo el proceso y mandos tanto manuales como automáticos son controlados por una tarjeta de desarrollo. El sistema óptico comprende de; un arreglo de espejos que básicamente dan el direccionamiento a la luz de los láseres y hacen que incidan sobre un mismo punto, al final se integra una fibra óptica para poder ingresar a partes inaccesibles en la boca para el tratamiento. Para validar el prototipo implementado, se realizaron mediciones tanto de la irradiancia como de la potencia en equipos especializados para estas aplicaciones, a más de basarse en revistas odontológicas y artículos de salud publicados por distintos institutos y universidades.

Design and Implementation of a Portable ECG Device

Electrocardiography(ECG) is the technology of measuring the electrical changes of the heart. The electrical change is due to the depolarization and repolarization of the heart cells which produces a specific wave or complex. The potential developed is captured by the electrodes placed on the skin, which ranges in micro to millivolts. Weak signals captured by the electrodes are amplified and converted into a voltage that is readable for microcontroller ATmega328P. ECG is represented by the waves called P, QRS, and T waves. One cardiac cycle of the heart consists of P-QRS-T waves in ECG. The amplitude of the waves, complexes, and the time interval between different waves or segments conveys the total information on the working activity of the heart. A proper study of those waveforms and time intervals on ECG aids to determine and diagnose different cardiac abnormalities. This paper presents a method of extraction of voltage generated during cardiac movement of the human body using an electrode, amplifier, microcontroller and OLED screen. It describes the method of calculating heartbeats per minute from the ECG signal and displays beats per minute on the same OLED screen.

Personal Assistance Device for Independent Senior Citizens/ Patients

Tracking the health of a person and proper medication improves their life time. Studies suggest the most of the deaths of the elderly people have occurred during the night when the person is asleep. A Caretaker cannot assist a person all the time. This work proposes a personal assistant for an elderly people or a patient. The Personal assistants can provide in-home respite care, allowing family members or other caretakers to take a temporary break. The main objective of this work is to help seniors maintain their quality of life at home and to keep them living their lives their way, as well as to lighten the load of full-time or family caretaker. This paper proposes an affordable personal assistance device for health monitoring of elderly people using different sensors which can measure pulse rate, position of elderly. Therefore the doctor can identify the abnormal values easily and can attend the patient if the device is used in the hospital. Proper intake of medicine at correct time is indicated by the display on OLED screen and an alert is produced by buzzer.

Smart Wearable Health Device for Heart Rate and Temperature Measurements

Lack of communication can be seen in many aspects, such as public health, and recycling. We found that in public health people suffer from lack of facilities and it may lead to death, but building new hospitals is not the right solution, but improved communication is. To solve both problems with a simple solution, the Internet of Things (IoT) had to be involved. So, we proposed a solution, which is a WHD (wearable health device) that measures temperature and heart rate for the patient and compares them to a database, it consists of Arduino Nano wired to both LM35 temperature sensor and pulse sensor. The readings are displayed on an OLED screen, as well as on a mobile application called ThingView. If the readings are abnormal, an action would be taken either to contact a relative or the ambulance, depending on its severity. It would decrease the trips to hospitals. We have tested for the device's efficiency and sensor calibration, and the results were promising. The competence of the pulse sensor is very high as its relative error is ±0.07. The temperature sensor (LM35) has very low relative error which is ±0.00356. The final cost was computed to be $26.5.

Experimental Demonstration of Single-Channel EEG Signal Using 32 × 32 Pixel OLED Screen and Camera

Currently, the radiofrequency (RF)-based wireless technology deployed in electroencephalography (EEG) to diagnose brain diseases suffers from frequency spectrum and electromagnetic interference, and might also have adverse effects on the health of patients and equipment used in hospitals, especially in RF-restricted zones like intensive care units (ICUs). Optical wireless communication (OWC), specifically visible light communication (VLC), is featured in 5G network to complement the radiofrequency (RF) technologies due to the fact that huge unlicensed bandwidth and available infrastructure, both indoor and outdoor, reduces the implementation cost. The conventional VLC systems deploy photodiodes as receivers, requiring hardware and infrastructure modifications in addition to smaller field of view (FOV), but the use of cameras reduce the infrastructure cost due to inbuilt filters and a wider FOV coverage gives the ability to scale a larger area. The wider FOV and the movement of camera rotation, without any additional adjustments to maintain the line-of-sight (LOS), allows the patient to be anywhere within the room and FOV. This paper demonstrates a novel healthcare system for EEG using visible light optical camera communication (VL-OCC), where a 32 × 32 pixel OLED screen acts as transmitter and the receiver section consists of several different cameras such as digital single-lens reflex camera (DLSR), android smartphone, and Thorlabs camera. The experiments were performed in LOS deploying on-off keying (OOK) modulation at several distant measurements to determine the system reliability and stability through bit error rate (BER) performance. The proposed system results depict that the DSLR camera outperforms the smartphone and Thorlabs cameras, as it is capable of transmitting an error free bit rate of 2.8 kbps at 30 fps up to 5.5 m.

Design and Implementation of an Intelligent Water Regime Detection System

An intelligent water regime detection system was designed for water detection. In the designed system, water level is detected by a pressure sensor and water pH is detected by a pH meter. After being processed by the AD chip TLC2543, the data are sent to the MCU via serial communication and the detection result is displayed on OLED screen or Bluetooth mobile phone. The software adopts time-sharing and power-down operation modes, and combines the relay to turn on/off the MCU peripheral circuit to reduce power consumption. The measurement deviations of water level, pH, and voltage were respectively less than 2 mm, 0.1, and 0.01 V and the minimum operating current was less than 6 mA. The low-power, high-precision and intelligent water regime detection is realized by the designed system.

可折叠OLED屏幕的弯折应力仿真

可折叠OLED屏幕的弯折应力仿真

Nulti stupanj reprezentacije: Umjetnost, tehnika i slikovno pojavljivanje

U suvremeno doba digitalno generiranih slika dolazi do epohalne promjene u načinu razumijevanja stvarnosti: da bismo uopće mogli razlikovati stvarnost od različitih vrsta imerzivnih slikovnih iskustava bit će nam potrebni novi epistemološki alati. Sada se nalazimo u tranzicijskom vremenu kada ne samo da se rekonfiguriraju postojeće tehnološke paradigme, nego se i filozofske paradigme na kojima je utemeljen moderni svijet prilagođavaju novim tehničkim i digitalnim slikama. Te slike više ne reprezentiraju ništa iz domene vidljivog svijeta, nego konstruiraju svoj vlastiti svijet; one ne prikazuju nego se pojavljuju stvarajući afekte, stanja i odnose. U ovome tekstu problematiziraju se umjetnost i reprezentacija u odnosu na pojam pojavljivanja kao epistemološkog uvida razvijenog u okviru opće znanosti o slici, a što bi nam trebalo omogućiti bolje razumijevanje polazišnog fenomena: naime, da granice između slika i stvarnosti postaju sve manje vidljive.

HiLight

We present HiLight, a new form of unobtrusive screen-camera communication for off-theshelf smart devices. HiLight hides information underlying any images shown on an LED or OLED screen, and camera-equipped smart devices can fetch the information by turning their cameras to the screen. HiLight achieves this by leveraging the transparency (alpha) channel, a well-known concept in computer graphics, to encode bits into pixel translucency changes without modifying pixel color (RGB) values. We demonstrated HiLight's feasibility using smartphones. By offering an unobtrusive, flexible, and lightweight communication channel between screens and cameras, HiLight allows new HCI and context-aware applications to emerge.

Pattern visual evoked potentials elicited by organic electroluminescence screen.

Purpose. To determine whether organic electroluminescence (OLED) screens can be used as visual stimulators to elicit pattern-reversal visual evoked potentials (p-VEPs). Method. Checkerboard patterns were generated on a conventional cathode-ray tube (S710, Compaq Computer Co., USA) screen and on an OLED (17 inches, 320 × 230 mm, PVM-1741, Sony, Tokyo, Japan) screen. The time course of the luminance changes of each monitor was measured with a photodiode. The p-VEPs elicited by these two screens were recorded from 15 eyes of 9 healthy volunteers (22.0 ± 0.8 years). Results. The OLED screen had a constant time delay from the onset of the trigger signal to the start of the luminescence change. The delay during the reversal phase from black to white for the pattern was 1.0 msec on the cathode-ray tube (CRT) screen and 0.5 msec on the OLED screen. No significant differences in the amplitudes of P100 and the implicit times of N75 and P100 were observed in the p-VEPs elicited by the CRT and the OLED screens. Conclusion. The OLED screen can be used as a visual stimulator to elicit p-VEPs; however the time delay and the specific properties in the luminance change must be taken into account.