Video Displays Research Articles

Yellow Cart Feature on Tiktok as a Medium to Attract Purchase Interest

The number of social media users worldwide reached 4.76 billion in January 2023, with 167 million active users in Indonesia. This study aims to understand how the yellow basket feature on TikTok attracts consumers' buying interest, using a qualitative approach through interviews and literature studies. The results show that this feature is effective in attracting buyers through factors such as attractive video displays, product promos, and ease of transaction processes. The promos offered, the attractive display of product videos, and the ease of transactions are the main factors that increase buying interest. In conclusion, the yellow cart feature on TikTok affects consumers' buying interest by providing ease of transactions and attractive promotions without the need to switch to other platforms.

IMPACT OF 222 NM UV-C RADIATION ON COLOR ACCURACY OF VIDEO DISPLAYS IN PUBLIC BUSES

IMPACT OF 222 NM UV-C RADIATION ON COLOR ACCURACY OF VIDEO DISPLAYS IN PUBLIC BUSES

Slim-panel holographic video display

Since its discovery almost 70 years ago, the hologram has been considered to reproduce the most realistic three dimensional images without visual side effects. Holographic video has been extensively researched for commercialization, since Benton et al. at MIT Media Lab developed the first holographic video systems in 1990. However, commercially available holographic video displays have not been introduced yet for several reasons: narrow viewing angle, bulky optics and heavy computing power. Here we present an interactive slim-panel holographic video display using a steering-backlight unit and a holographic video processor to solve the above issues. The steering-backlight unit enables to expand the viewing angle by 30 times and its diffractive waveguide architecture makes a slim display form-factor. The holographic video processor computes high quality holograms in real-time on a single-chip. We suggest that the slim-panel holographic display can provide realistic three-dimensional video in office and household environments.

Concern of Photosensitive Seizures Evoked by 3D Video Displays or Virtual Reality Headsets in Children: Current Perspective.

This review assesses the risk of a photic-induced seizure in a child during viewing of 3D (binocular 3 dimensional, stereoscopic) movies or games, either on standard video displays or when wearing a virtual reality (VR) headset. Studies published by pediatric epilepsy experts emphasize the low risk of 3D viewing even for children with known photosensitive epilepsy (PSE). The low incidence of PSE is noteworthy because the number of hours devoted to 2D or 3D screen viewing and/or VR headset use by children worldwide has increased markedly over the last decade. The medical literature does not support the notion that VR headset use poses a risk for PSE.

Prediction of color characteristics of luminescent video display based on fluorescent polyolefin films containing CdSe/CdS/ZnS quantum Dots

This paper is devoted to a consideration of the possibility to predict the color characteristics of a luminescent video display based on fluorescent polyolefin films containing CdSe/CdS/ZnS quantum dots. It is shown that the use of new colloid semiconductor materials based on CdSe/CdS/ZnS opens up wide prospects for the development of a new generation of luminescent video displays. New methods are developed and existing ones are adapted for the calculation and prediction of the color gamut of luminescent and liquid-crystal (LC)monitors.

Effect of alternative video displays on postures, perceived effort, and performance during microsurgery skill tasks

Physical work demands and posture constraint from operating microscopes may adversely affect microsurgeon health and performance. Alternative video displays were developed to reduce posture constraints. Their effects on postures, perceived efforts, and performance were compared with the microscope. Sixteen participants performed microsurgery skill tasks using both stereo and non-stereoscopic microscopes and video displays. Results showed that neck angles were 9–13° more neutral and shoulder flexion were 9–10° more elevated on the video display than the microscope. Time observed in neck extension was higher (30% vs. 17%) and neck movements were 3x more frequent on the video display than microscopes. Ratings of perceived efforts did not differ among displays, but usability ratings were better on the microscope than the video display. Performance times on the video displays were 66–110% slower than microscopes. Although postures improved, further research is needed to improve task performance on video displays.

30.1: Review on Dynamic Holography in Materials for Large‐size Holographic 3D Video Display

Some novel results were reported on dynamic holography recently. We furthermore obtained real‐time holographic 3D video display in super‐fast liquid crystals. Some of the latest holographic 3D display developments are presented in this paper. These achievements might become good candidates to realize large‐size, high‐resolution and color 3D holographic video displays.

Anisotropic leaky-mode modulator for holographic video displays

Every holographic video display is built on a spatial light modulator, which directs light by diffraction to form points in three-dimensional space. The modulators currently used for holographic video displays are challenging to use for several reasons: they have relatively low bandwidth, high cost, low diffraction angle, poor scalability, and the presence of quantization noise, unwanted diffractive orders and zero-order light. Here we present modulators for holographic video displays based on anisotropic leaky-mode couplers, which have the potential to address all of these challenges. These modulators can be fabricated simply, monolithically and at low cost. Additionally, these modulators are capable of new functionalities, such as wavelength division multiplexing for colour display. We demonstrate three enabling properties of particular interest-polarization rotation, enlarged angular diffraction, and frequency domain colour filtering-and suggest that this technology can be used as a platform for low-cost, high-performance holographic video displays.

Comparison of the EMI Performance of LED PWM Dimming Techniques for LED Video Display Application

Light-emitting diode (LED) video displays enclose thousands of LEDs which create the resulting image. LED intensity is regulated using pulse width modulation (PWM). Though the individual LED current is small, the total current consumed is large. Simultaneous switching of a large number of LEDs dimmed by PWM can cause serious electromagnetic interference (EMI). Three LED PWM dimming techniques have been studied for potential EMI. Techniques represent different current pulse positioning in time: the aim of study was to compare the spectrum of current produced in LED video display power supply circuits when discussed techniques are used for pixel intensity control. It was assumed that the produced EMI is proportional to the power supply current. The power supply filter and transient load decoupling capacitors were not taken into account. The uniform and nonuniform pixels' intensities distribution within an image were assumed. Spectrum has been studied on a single pixel and the video display tile containing 16 × 32 LEDs. Resulting time diagrams and frequency responses are presented. The results indicate that, despite expected significant advantage of binary PWM methods, in realistic case all methods' performance is similar.

An evaluation of the efficacy of video displays for use with chimpanzees (Pan troglodytes).

Video displays for behavioral research lend themselves particularly well to studies with chimpanzees (Pan troglodytes), as their vision is comparable to humans', yet there has been no formal test of the efficacy of video displays as a form of social information for chimpanzees. To address this, we compared the learning success of chimpanzees shown video footage of a conspecific compared to chimpanzees shown a live conspecific performing the same novel task. Footage of an unfamiliar chimpanzee operating a bidirectional apparatus was presented to 24 chimpanzees (12 males, 12 females), and their responses were compared to those of a further 12 chimpanzees given the same task but with no form of information. Secondly, we also compared the responses of the chimpanzees in the video display condition to responses of eight chimpanzees from a previously published study of ours, in which chimpanzees observed live models. Chimpanzees shown a video display were more successful than those in the control condition and showed comparable success to those that saw a live model. Regarding fine-grained copying (i.e. the direction that the door was pushed), only chimpanzees that observed a live model showed significant matching to the model's methods with their first response. Yet, when all the responses made by the chimpanzees were considered, comparable levels of matching were shown by chimpanzees in both the live and video conditions.

Synchronous Controller of LED Video Displays and LED Lighting Compatible

The development of a large display and can control a variety of compatible lighting control system, the system is suitable for wide range control distance. Can be widely used in modern college park, landscape building, business building and landscaping all buildings, publicity, service, advertising and other large screen and lighting systems. Using large-scale high-speed FPGA technology, Gigabit fiber communication technology, through a multi-level processing and protocol conversion, can be terminal for the different display mode (divided into static, 2 sweep, sweep 4, 8, sweep, sweep five kinds of 16), data in the order, alignment methods, control methods, the preparation of their own in the FPGA, the protocol conversion module, through the software are free to choose set the display terminal type, to achieve 16 control port can be controlled separately different types of display terminal. Control distance up to 5000 meters or more. Effectively address all the original control system can not be compatible, not centralized control, can not share resources and control of the key problems of distance is too short.

Effects of Visual Context upon Functional Connectivity during Observation of Biological Motions

The aim of this study was to examine brain responses, in particular functional connectivity, to different visual stimuli depicting familiar biological motions. Ten subjects actively observed familiar biological motions embedded in point-light and video displays. Electroencephalograms were recorded from 64 electrodes. Activity was considered in three frequency bands (4–8 Hz, 8–10 Hz, and 10–13 Hz) using a non-linear measure of functional connectivity. In the 4–8 Hz and 8–10 Hz frequency bands, functional connectivity for the SMA was greater during the observation of biological motions presented in a point-light display compared to the observation of motions presented in a video display. The reverse was observed for the 4–8 Hz frequency band for the left temporal area. Explanations related to: (i) the task demands (i.e., attention and mental effort), (ii) the role(s) of theta and alpha oscillations in cognitive processes, and (iii) the function(s) of cortical areas are discussed. It has been suggested that attention was required to process human biological motions under unfamiliar viewing conditions such as point-light display.

Numerical comparison of LED directivity approximation functions for video displays

The approximation functions of the directivity of the light emitting diodes (LED) have been investigated. LEDs used in large scale LED video displays have been studied. LED directional properties among the other parameters define the video display image quality. The simplicity of an approximation function and ease of analytical handling have been targeted. These functions suppose to be used in display directivity engineering. Four candidate approximation functions were identified and their approximation performance analyzed. The evaluation is done on eight different type LEDs’ sample batches. These samples have been chosen to represent the variety of the main colors and the range of the most popular viewing angles used in large scale LED video displays design. The relative intensity approximation root mean square (RMS) error and approximation errors’ cross correlation have been used as performance estimation criteria. The radiometric intensity variation within a manufacturing lot was suggested as lower error bound. Approximation error variance was analyzed for various approximation ranges. Results of four candidate approximation functions’ performance on eight different type LEDs’ are presented.

Qualitative analysis of lumbar stabilization using point light and normal video displays.

Professionals in many fields use qualitative analysis to improve human movement. In previous research examining the reliability of physical therapists' qualitative assessments of lumbar stabilization, three experienced observers showed substantial agreement when viewing point light displays, but only moderate agreement when observing normal video displays. Replication of these findings in a larger group of less experienced observers would strengthen the notion that point light displays enhance qualitative analysis. The present study examined the reliability of qualitative assessments of lumbar stabilization when novice observers made judgments from two types of video displays. 50 fourth-year physical therapy students viewed either normal or point light video displays to judge lumbar stabilization of individuals performing a floor to waist lift. Multirater kappa coefficients for assessments made from normal displays and point light displays were .30 and .46, indicating fair and moderate agreement, respectively. These results suggest that point light displays may enhance observers' visual perception of human movement.

Growth, Development, Reproduction, Physiological and Behavioural Studies on Living Organisms, Human Adults and Children Exposed to Radiation from Video Displays

Various living organisms, human workers and children were tested for any biological action resulting from exposure to radiation from video display terminals (VDTs). VDTs were powered by a 50-Hz alternating volt age of 220 V. Measured electric and magnetic fields were 13 V/M and 50 nT, respectively. Living organisms were maintained under their normal breeding conditions and control values were obtained before switching on the VDT. Various effects related to the irradiation time were demonstrated, i.e. growth delay in algae and Drosophila, a body weight deficiency in rats, abnormal peaks of mor tality in Daphnia and Drosophila, teratological effects in chick embryos and behavioural disturbances in rats. The embryonic and neonatal periods showed a high sensitiv ity to the VDT radiation. In humans, after 4 h of working in front of a VDT screen, an increase in tiredness and a decrease in the resistance of the immune system were observed in workers. In prepubertal children, 20 min of exposure were sufficient to induce neuropsychological disturbances; pre-pubertal young people appear to be particularly sensitive to the effect of the radiation. ln human testicular biopsies cultured in vitro for 24 h in front of a VDT screen, mitotic and meiotic disturbances, the appearance of degeneration in some aspects of the cells and significant disorganisation of the seminiferous tubules were demonstrated and related to modification of the metabolism of the sample. An experimental appa ratus has been developed and tested that aims to pre vent the harm from VDT radiation. Known commercially as the emf-Bioshield®, it ensures effective protection against harmful biological effects of VDT radiation.

Utilization Issues for Large Consumer Video Displays

The acceptance by U.S. consumers of large screen, rear projection video receivers will grow until this segment of the television market accounts for approximately a million units per year and the largest share of profit from sales. The near term availability of high-definition digital television (DTV) signals in the U.S., Japan, Europe, and elsewhere will continue to drive growth in this sector. New market opportunities will emerge for rear projection, front projection, and flat panel large screen displays. This presentation will briefly review the diverse technologies available to serve these three types of display. Comparisons will be drawn between the quoted/expected display specifications, which tend to be driven by engineering and marketing criteria, and the actual performance required and/or likely to be achieved in the consumer's dwelling, which tends to be determined by architecture, furniture, children, pets, school, work, dinner, and the limits of personal wealth.

Normalization of brightness and contrast in video displays

The nonlinearity of the video display, together with variations in brightness and contrast arising from variability in the data, will affect the visual discrimination of features of interest. The loss of displayed information is due to environmental and instrumentation effects, and can be partially corrected for in real-time (i.e. at video frame rates) if the data is digitized and approriately normalized. Methods are described for normalizing the contrast and brightness of video displays and for correcting for luminance compression. Experimental results for a sidescan sonar display demonstrate that statistical normalization and gamma-compensation improve the visibility of seabed features and therefore the reliability of visual search during seabed surveillance.Zusammenfassung. Die Un-linearität des Videobildes, zusammen mit den aus der Variabiltät in den Daten herrührenden Variationen in Helligkeit und Kontrast, wird die visuelle Diskriminierung von interessanten Merkmalen beeinflussen. Der Verlust in bildlich dargestellter Information beruht auf Umwelts - und Instrumentierungs - Effekten, und kann teilweise für Echtzeit (d.h. Videobildgeschwindigkeit) korrigiert werden, falls die Daten digital dargestellt und sachgemäss normaliziert sind. Beschrieben sind Methoden für das Normalizieren von Kontrast und Helligkeit des Videobildes und für das Korrigieren der Leuchtkraft - Kompression. Versuchsresultate für ein seitenabsuchendes Echolot - Bild demonstrieren, dass statistische Normalizierung und Gamma - Kompensation die Klarheit der Meeresgrund - Besonderheiten, und damit die Verläss-lichkeit des visuellen Absuchens während einer Meeresgrund - Überwachung, verbessern.

A video system to help children cooperate with motion control for radiation treatment without sedation

A behavioral program for teaching children to cooperate with radiation treatment without sedation was previously published in this journal. Outcome data from using that program with 11 more children are reported here. For these children, an apparatus was developed to display video cartoons and movies during their behavioral training, radiation therapy planning, and daily treatments. Literature supporting the use of video displays to provide relaxation, distraction, and counterconditioning during medical procedures is highlighted. With behavioral training and the video display, 9 of the 11 children were able to avoid any sedation for daily treatments. A 10th child was able to avoid general anesthesia for his last 10 daily treatments. The advantages and limitations of behavioral training as an alternative to repeated sedation or anesthesia for radiation treatment are discussed.

A video system to help children cooperate with motion control for radiation treatment without sedation.

A behavioral program for teaching children to cooperate with radiation treatment without sedation was previously published in this journal. Outcome data from using that program with 11 more children are reported here. For these children, an apparatus was developed to display video cartoons and movies during their behavioral training, radiation therapy planning, and daily treatments. Literature supporting the use of video displays to provide relaxation, distraction, and counterconditioning during medical procedures is highlighted. With behavioral training and the video display, 9 of the 11 children were able to avoid any sedation for daily treatments. A 10th child was able to avoid general anesthesia for his last 10 daily treatments. The advantages and limitations of behavioral training as an alternative to repeated sedation or anesthesia for radiation treatment are discussed.

Applying virtual reality

Virtual reality (VR) immerses a user within a simulated three-dimensional environment. Still in its infancy, much remains to be done, but the field shows great promise. Computer processing speed, graphics, networks, and specialized peripherals all play a part in creating believable applications. In a full VR implementation, the user wears specialized goggles that substitute small video displays for the lenses, one for each eye. The displays become the "lenses" onto a simulated world. The head-mounted display containing the goggles detects head movement and updates the user's view accordingly; the user has the impression of looking around, even moving within, the simulated environment. The sensory experience can be further enriched with sound, or a data glove to simulate contact between the user and simulated objects. In a partial VR implementation, a computer's video display becomes a window onto the simulated environment, and no external gear is required. In a networked environment, people can be immersed in the same simulation, each perceiving it from their own point of view.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>