Screenless Display

 

What is Screenless Display?

Screenless display is an interactive projection technology developed to solve the problems related to the device miniaturization of the modern communication technologies. The lack of space on screen based displays provides an opportunity for the development of screenless displays. As the name indicates screenless display has no screen and it can be defined as a display used to transmit any data such as pictures or videos without the help of screens.

Types of Screenless Display

Screenless display technology is divided into three main categories:

• Visual Image Display
• Retinal Display
• Synaptic Interface

The first category, visual image is defined as the things that can be seen by the human eye such as holograms. The second category, retinal display – the name itself- indicates the display of image directly onto the retina. The third category , synaptic reference which means sending information directly to the human brain. Let us look on in detail about these three display types.

1. Visual Image Display

The visual image is a type of screenless display, which recognizes any type of image or thing with the help of the human eye.The following are few examples of the visual image display: holographic display, virtual reality goggles, heads up display, etc. The working principle of this display states that the light gets reflected by the intermediate object before reaching the retina or the eye.   

Heads up display are also named as transparent displays. These displays are applied in different applications such as aeroplanes, computer games and automobiles, etc. Many of the users do not need to look away from their field of view because the device displays the information on a windshield. An orginary heads up display comprises of following components: a projector unit, combiner and a computer. 

The main advantage of visual image displays is creating and manipulating the images upto any size. In this category of displays, multiple bitmaps can be composited together in the object mode and, in the image mode, manipulation takes place. In this display system, Eye files are created which consists of all the images that are loaded. The EYE file creates a ‘Export Project Command’ in the file. These commands in EYE file provide a provision to save any sort of unsaved images in the form of bitmaps into it. A common catalog is created to place the browsed images from ‘Export Editor Command’ in the ‘EYE’ file.

2. Retinal Display

The second category of advancement in display system, retinal display as the name itself indicates the display of image directly onto the retina. Instead of using some intermediate object for light reflection to project the images, this display directly projects the image onto the retina.The user will  sense that the display is moving freely in the space. Retinal display is commonly known as retinal scan display and retinal projector.This display allows short light emission, coherent light and narrow band color. 

3. Synaptic Interface:

The third category, synaptic interface means sending information directly to the human brain without using any light. This technology is already tested on humans and most of the companies started using this technology for effective communication, education, business and security system. This technology was successfully developed by sampling the video signals from horse crab eyes through their nerves, and the other video signals are sampled from the electronic cameras into the brains of creatures.

The brain computer interface allows direct interaction between the human brain and external devices such as computer.This category can also be known by different names such as human machine interface, synthetic telepathy interface, mind machine interface and direct neural interface.

These are the three types of latest Screenless displays which replace the current use of touch screen technology to fill the lack of space in the screen-based electronic displays.We hope that the future definitely looks promising for this technology.  Let us wait for the day when we all will be treated by this technology.