spherical lcd screen free sample

TourGuide lets you create interactive spherical touch screen media mashups for the Magic Planet.  In other words it lets you take global images and animations; add interactive hot spots and links anywhere on the globe; then attach media to the links.  It’s an easy-to-use tool designed to build interactive applications for the Magic Planet.

People pay attention longest when they’re in control – when they’re interacting to see and hear your story in the order they want, the way they want. Many Magic Planet customers already provide a touchscreen so visitors can control their Magic Planet exhibit or display. TourGuide takes Magic Planet interactivity to the next level. With TourGuide, it’s easy to build interactive Magic Planet applications where visitors interact directly with the Magic Planet using a mouse, trackball or other input device.

Recently, LED electronic displays not only bring us great convenience but also add living color to cities. With the continuous improvement of LED display technology, the designs of LED displays are more artistic and aesthetic. Appear various shapes of LED screens like “wavy” and “ball”. Spherical LED display is a newly developed LED display product with characteristics of out of a fashion, beauty and flexibility.

Spherical LED displays are divided into two types of production. The first one is the entire spherical LED display and the second one is the hemispherical LED display. In general, the first type is small and it is about two meters in diameter which can be seen in a very short distance. The second type is bigger than the first one which can be seen in a longer distance.

a. For large diameter outdoor spherical LED display, we can produce it by single-pixel tube. Cut the screen ball piece by piece according to the latitude and each different latitude place a row of LED pixel tube.

b. For small diameter indoor spherical LED display, we adopt SMD 3inl LED lamps, pixel controllable LED strips made by flexible PCB board. And then circle the spherical bracket with these LED strips by latitude.

c. For indoor LED sphere display, we can also design some special LED PCB boards according to its pixel pitch. The special-shaped led board can be designed to a triangle facility to splice. It can be designed as a hexagon board as well. There are many different models available for indoor spherical LED display, for example, P4, P5, P6, P10 and so on.

There are many led spherical display screen, including stretched displays, media players, touch displays, LED-backlit display that support different audio and video formats. These led spherical display screen slickly display content in ultra-high and HD definitions and stand out as the most cost-effective and reliable digital signage players. Added with unique ultramodern features to deliver vibrant displays, these led spherical display screen are ideal for restaurants, offices, supermarkets, retail shops, and more.

Wholesale led spherical display screen include racks designed to help you organize different types of jewelry, clothes and accessories. For instance, the standing earring holder is a jewelry organizer meant to hold earrings, while the earring racks help you display your earrings and serve as a beautiful decorative item. The sunglass rack can be rotated 360 degrees and can fit a large number of glasses and shades. It has several hooks and holes that will help you showcase your products. Browse through Alibaba.com and pick the right fit for your business.

Alibaba.com features an exciting range of led spherical display screen that are suitable for all types of residential and commercial requirements. These fascinating led spherical display screen are of superior quality delivering unmatched viewing experience and are vibrant when it comes to both, picture quality and aesthetic appearances. These products are made with advanced technologies offering clear patterns with long serviceable lives. Buy these incredible led spherical display screen from leading suppliers and wholesalers on the site for unbelievable prices and massive discounts. The optimal quality led spherical display screen on the site are made of sturdy materials that offer higher durability and consistent performance over the years. These top-quality displays are not only durable but are sustainable against all kinds of usages and are eco-friendly products. The led spherical display screen accessible here are made with customized LED modules for distinct home appliances and commercial appliances, instruments, and have.

The latest display technology that offers such applications an alternative display option is the spherical display system as developed by the University of British Columbia in cooperation with the University of Saskatchewan. While this technology has been around for a few years, the latest version allows more than one viewer to see a computer generated image within the sphere. According to the inventors, the new spherical display called Crystal is capable of providing two users with the means to complete cooperative tasks, video conferencing, virtual learning or play games for that matter. All of this with the correct 3D perspective from every angle.

The system consists of a 600mm (24inches) hollow plastic sphere that is used as a projection screen of some sorts. The system is completed by using four high speed short throw projectors and a camera. While the sphere is obviously custom-made, the projectors and the camera are off-the-shelf items. The next system may enable four people to interact simultaneously. This implementation is basically a rear projection system with blended projectors illuminating the inside of a spherical surface.

The group calls this a 3D perspective corrected spherical display. To be clear this is not a volumetric display as the every light emitting point lies on the inner surface of the hollow sphere. In order to create the correct perspective for every viewer the system has to calculate the correct image based on the position of the viewer. The camera provides the means to identify the exact position of the viewer in the space around the sphere. Since the display is spherical, the user can walk around and watch the back of any projected object. This makes it clear that content capture is not an easy thing and more likely this set up will work with computer generated content.

Scientists have developed a spherical LCD that"s suitable for embedding in contact lenses. A prototype of the miniature curved display unveiled today shows a dollar sign; its creators say this a nod to the "many cartoons that feature people or figures with dollars in their eyes." Despite how simple that symbol may seem, it perfectly demonstrates the advantages offered by LCD technology compared to LED-based contact lenses that have come before. Researchers at The Centre of Microsystems Technology in Belgium have engineered the display so that its entire surface area can be pixelated.

As of now the scope is fairly limited — it"s only capable of outputting "rudimentary" patterns similar to those you"d see on a pocket calculator. But future implications are far more promising than this initial prototype, and scientists are hopeful the LCD will be harnessed for medical purposes. For example, it could enable those with a damaged iris to limit the amount of light transmitted toward their retina. Cosmetic uses are also possible: someone with two different-colored eyes could potentially use such a lens to achieve uniformity. Researchers hope to see real-world applications within the next few years.

To walk with a typical gait, the fly needs to be positioned ~0.4 mm from the surface of the sphere, and aligned to the center of the ball (see Supplementary Figure S5J). We use a second, identical micromanipulator, of our own design, described in section 2.2.6, with the arm that positions a fly so they are walking at 10°, or slightly “uphill”—based on the observation that this incline appears to improve walking performance (personal communication, Shiuan-Tze Wu). The tether is friction mounted onto the arm and can be gently rotated to align the long axis of the fly toward the screen.

For the inexpensive treadmill setup, we used a widely available tablet computer with an in-plane switching (IPS) liquid-crystal display (LCD), an Amazon Fire 7 with a nominal screen size of 7 in Figure 3A. We connected the tablet to a USB power supply and to a local Wi-Fi network during all experiments and displayed visual patterns through a web browser. To allow replication across devices, we used Mozilla Firefox instead of the pre-installed browser. We installed the most recent versions of Firefox and kept the Android 9 based Fire OS updated with the latest release (most recently Firefox 86.1.x and Fire OS-7.3.x). We manually set the display brightness to 24%. IPS displays are known for their relatively wide “viewing angle,” but from the position of the fly 35 mm in front of the center, there will be an intensity gradient depending on the pixel position. For the patterns we display, this effect partially reduced since we compensate for the view-angle by increasing the physical width, and therefore the brightness, of bars closer to the edge of the screen (Figure 3B).

Figure 3. Display used to present a range of visual stimuli. (A) In our typical experiment, a tethered fly walks on an air-supported foam sphere, while facing a tablet computer that displays a moving grating pattern. (B) The FlyFlix software renders a virtual scene that simulates a cylindrical display onto the tablet"s flat screen. The azimuthal span of each bar within a grating pattern is scaled to correct for the viewing angle—even though the dark bar on the left is ~3 × as wide as the bright one in the center, they both span 10° from the perspective of the fly positioned 35 mm in front of the display. The purple spot on the right marks the location where light measurements reported in Figures 4A–C were made. (C) Space-time representations of the display during trials showing a moving grating pattern (spatial axis displayed right-to-left, time axis is top-to-bottom). Each row of these images represents one horizontal slice through the displayed pattern, at the indicated point in time. For these 3 s trials showing moving patterns with different spatial periods and temporal frequencies, clock-wise motion appears as space-time tilts that go down and to the left. (D) Representation of displayed screen content during object following conditions for clockwise movement with the indicated speeds.

The FlyFlix client and server communicate over a bidirectional, low-latency WebSocket connection. The server can deliver different experiments at specific URLs, or different views on the same experiment to different displays (a feature not used in our standard setup). Once the client connects to the server, it shows a “Fullscreen” and a “Start” button, the first changes the client to a full-screen mode, while the seconds sends the request to the server to start the experiment. After the protocol finishes or the WebSocket connection is interrupted, the FlyFlix client displays a button to “Reconnect” to the server. When the client starts the experiment, the server generates a set of trials based on the pre-specified configuration. The FlyFlix client renders a scene based on its local representation of the stimulus. The server sends updated parameters to change the representation and the client continuously reports back the actual state of the rendered stimulus. This bidirectional communication happens throughout the experiments with time-stamped messages. We implemented the FlyFlix server in Python-3.9 using the Flask-1.1.2 web framework. Bidirectional communication from the server-side is based on Flask-SocketIO-5.x with concurrent networking through Eventlet-0.30. The JavaScript client uses two external libraries: Socket.IO-3.1 for the communication and Three.js-r124 for rendering the visual stimuli.

The FlyFlix server generates and controls experiments. Depending on the experimental condition, the server asynchronously sends parameters describing the virtual scene to the client. These parameters primarily concern the scene layout as well as rotational speed, orientation, and maximum refresh rate of the camera. Based on the set of parameters, the client continuously renders the current frame. This decouples the timing of server and client: the server communicates changes to the virtual world in real-time, but does not need to consider the capabilities of the client such as the screen refresh rate. Similarly, the client is independent from the server—if there is a lag in the communication from the server to the client, the client renders the previously communicated parameter instead of waiting for instructions. The client sends its time-stamped state to the FlyFlix server where they are stored in a log file together with the time-stamped server status. This on-line stimulus tracking allowed us to characterize the performance of our display and the network latency (Figure 4) and should enable powerful extensions of FlyFlix that we discuss below.

In the object-following conditions, a bright vertical 45° bar moves across the screen, exactly once at one of 6 angular speeds (ω = 22.5, 90, 180, 360, 675, and 1350°s-1) in either the clockwise or counterclockwise direction. Consequently, these trials have different durations between 0.13 and 7.8 s. During the 500 ms pre- and post-trial period, the screen is fully dark. Diagrams in Figure 3D illustrate these conditions.

When presented with rotating patterns, flies tend to turn in the direction of the pattern movement, a response seen in single trials and across trials for the example condition shown in Figure 5B. While there is some trial-to-trial variability, in nearly every trial, the flies turned in the clockwise, or positive direction (in yellow) for clockwise pattern motion and in the counterclockwise, or negative direction (in purple) for counterclockwise pattern motion, a pattern that is clearly seen across flies and stimulus speeds (top of Figure 5C). The amplitude of the turning velocity we measured depends on the temporal frequency of the pattern movement (observable in the data combined from both directions, in the lower row of Figure 5C). This is precisely the expected result, since temporal frequency tuning is a well-described aspect of fly motion vision—insects are most sensitive to movement of periodic pattern with some temporal frequency optimum, and are less sensitive to movements with both higher and lower temporal frequency (Götz and Wenking, 1973). We compare our results, plotted using the mean responses during the period of stimulus presentation as a tuning curve, to the most relevant, recent independent measurement from another lab using a different setup (Figure 5D contains an overlay of data from Creamer et al., 2018). We find that in our experiments, for most conditions, flies turned more overall, and we see similar, monotonically increasing response levels up to 4 Hz motion. At the highest temporal frequencies we see an interesting difference, where our responses were reduced, the responses from Creamer et al. (2018) remain much larger. We attribute this difference to limitations of our display. As previously discussed, the tablet refreshes the screen content with 60 fps; at this refresh rate, a 30 Hz temporal frequency motion grating will appear as flicker—containing no net motion, and so it is expected that our flies cannot turn to follow motion that is not there. Similarly, the responses to 7.5 and 15 Hz pattern motion are reduced since the illusion of smooth motion is weaker at these speeds. Aside from these technical limitations of the display at very fast speeds, we find excellent concordance between our measurements and those of previous experimenters.

In this paper, we have described our re-implementation of a complete system for tethering flies and the accompanying experimental setup for measuring tethered fly walking behavior to controlled visual stimuli (Figures 1, 2). Our spherical treadmill setup takes a fresh look at the fly-on-a-ball paradigm. While the design is guided by several decades of experimental methods development, we have been optimizing the setup by simplifying the components, reducing costs, and ensuring availability. Since many of the components have not previously been deployed in animal behavior setups, we validated their performance (Figure 4). We found excellent reliability for the low-cost display and low network latencies, which combine to establish a highly reliable new method for experimental control. This system comes with other advantages such as a flexible stimulus control software that can dynamically correct for the viewing angle (Figure 3). Finally, we measured the walking behavior of flies to a range of moving visual stimuli and confirmed, in exquisite detail, that our new setup is capable of reproducing nearly all relevant prior measurements using similar visual stimuli for wide-field gratings and small moving objects. Therefore we now have a low-cost setup that is a quite reliable instrument, and consequently find that it produces highly reliable open-loop behavioral measurements. Based on this experience, we believe our setup will be ideal for teaching courses and for a wide range of laboratory uses. We sincerely hope that the reduced complexity and enhanced accessibility of these setups will excite many young scientists about quantitative animal behavior, and will increase the reproducibility of research observations. In the following sections we discuss cost savings of our system, the cost of cost savings in the form of limitations, some possible extensions, and future work.

FlyFlix, the system of a single server providing stimuli for network connected display clients, is extensible to multiple tablet displays. For the low-cost implementation described here, we have only used a single display in front of the fly covering ~130° in azimuth and 100° in elevation. Our lab"s standard cylindrical displays cover 270° in azimuth, and this larger field of view is critical for some visually guided behaviors. Virtually any display will present non-uniform brightness from the perspective of the fly. In our current implementation, we do not correct for this, as there is little evidence to suggest that optomotor behaviors with large-field, high-contrast gratings are sensitive to these local brightness variations. Nevertheless, the brightness of the display as viewed by the fly, at each location on the screen, can be measured and corrected for by non-uniformly masking the local brightness of the display. This step should be seriously considered if users wish to use such a display for measurements of neuronal responses within small receptive fields. Furthermore, the tablet we chose only supports refresh rates of 60 fps. This limits the speed of stimuli that can be shown, including to motion speeds that the fly can perceive (see Figure 5D). Many apparent motion stimuli—including most of the moving gratings and the small moving objects shown in Figure 5—can be very well-approximated at this display refresh rate, but this illusion of smooth motion breaks down for stimuli defined by very fast motion. Newer handheld displays with higher refresh rates and gaming monitors used in other experimental setups overcome this limitation, but at significantly increased cost (Kaushik et al., 2020). The FlyFlix software is agnostic to the display and should work “out of the box” with higher refresh rate displays. Nevertheless, network latency will be a limiting factor for high-speed closed-loop systems, but there is little reason to believe that flies (or just about any animal) required closed loop latencies that are less than ~10 ms.

Moore, R. J. D., Taylor, G. J., Paulk, A. C., Pearson, T., van Swinderen, B., and Srinivasan, M. V. (2014). FicTrac: a visual method for tracking spherical motion and generating fictive animal paths. J. Neurosci. Methods 225, 106–119. doi: 10.1016/j.jneumeth.2014.01.010

The Japanese telecom company NTT DOCOMO recently revealed what it claims is the "world"s first spherical drone display." Although it appears to be a solid, globe-shaped screen while in flight, the display is actually an unmanned aerial vehicle (UAV, or drone) inside a spherical frame with curved LED strips. The LEDs spin rapidly during flight, creating the illusion of a spherical screen. The drone display was showcased April 29-30 during the Niconico Chokaigi conference, a festival of Japan"s internet culture.

Though the technology is not yet ready for commercial use, the company said it should be available by March 2019. These flying screens could be used for advertisements during a sporting event, or to display information at a concert, according to DOCOMO. [Photos from Above: 8 Cool Camera-Carrying Drones]

Previously, it was challenging to equip a drone with a spherical display because it interfered with the airflow of the drone"s propellers, according to DOCOMO. In addition, the display"s weight tended to drag down the aircraft. The telecom company solved these issues by using a mostly hollow display, which allows for better airflow and is lightweight.

The spherical frame surrounding the drone has a maximum diameter of about 35 inches (88 centimeters), and the display measures 144 pixels high by 136 pixels wide. The entire device, drone and display, weighs just 7.5 pounds (3.4 kilograms). Since it"s relatively small and light, the drone display is highly maneuverable and, according to DOCOMO, could be operated virtually anywhere.

In the example above both warp and blend are used to achieve a seamless, blended picture from two projectors illuminating a curved screen. A standard practice when using multiple projectors is to overlap the seams where each projected image touches another. Since optics and screens are never perfect and overlapping can create hotspots (regions gets twice amount of light) blend is used to adjust the intensity of the overlapping region. Warp is used to modify geometry so that it matches the curve of the projection wall.

NVAPI is NVIDIA"s core software development kit that allows direct access to NVIDIA GPUs on windows platforms. Warp and blend is implemented as an interface in NVAPI that programmably exposes warping and intensity adjustment features before the final scanout. Working in conjunction with a supported NVIDIA Display Driver, the warp and blend features works on a single screen, multiple screens and multi-gpu configurations and are available only with NVIDIA Quadro GPUs.

The PanoLab is a wide-area high realistic projection system for interactive presentations of virtual environments. The half-spherical screen of PanoLab allows the simulation of large visual fields providing an increased degree of immersion. The PanoLab was calibrated using nWarp, part of the ProjectionTools automatic calibration system from domeprojections.com

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