06-04-2012, 10:56 AM
head-up display system
HEAD-UP-DISPLAY.docx (Size: 26.18 KB / Downloads: 37)
ABSTRACT
A head-up display system projects an image directly onto the human retina with low-energy lasers or LCDs. Head-up displays can give the user ' the illusion of viewing a typical screen-sized display hovering in the air several feet away. In principle the technology can provide full-color, high¬resolution dynamic displays, but in practice the components necessary to achieve the full potential of the technology are either highly expensive. ; Although the technology was invented by the University of Washington in the Human Interface Technology Lab (HIT) in 1991, development did not begin until 1993; the technology still needs much refinement and has only been commercialized in specialized sectors of the display market such as automobile repair and some parts of the military.
INTRODUCTION
Our window into the digital universe has long been a glowing screen perched on a desk. It's called a computer monitor, and as we stare at it, light is focused into a dime-sized image on the retina in the back of our eyeball. The retina converts the light into signals that percolate into your brain via the optic nerve.
Here's a better way: paint the images themselves directly onto your retina, and eliminate that bulky, power-hungry monitor altogether. To paint the images, use tiny semiconductor lasers or special light-emitting diodes, one each for the three primary colors (red, yellow, and blue), and scan their light onto the retina, mixing the colors to produce the entire palette of human vision. Short of tapping into the optic nerve, there is no more efficient way to get an image into your brain.
PRINCIPLE
Head-up display have now become so compact and lightweight that an emerging use is for displaying information to workers on site locations such as power stations, airports and events. A new breed monocular head¬up displays (HUD) cater for this application.
These displays are discreet and easy to use and are being used in the field by engineers, security and police forces.
Projection methods
The most common means by which current HUDs are implemented is to project the image onto a clear glass optical element ('combiner'). Traditionally, the source for the projected image has been a Cathode Ray Tube (CRT), however newer image sources based on micro-display technologies are now being introduced. Micro-display technologies that have been demonstrated include Liquid Crystal Display (LCD), Liquid Crystal On Silicon (LCOS), Digital Micro Mirrors (DMDs), Organic Light-Emitting Diode (OLED) and Laser.
ADVANTAGES
The head-up display is highly efficient with respect to power consumption, requiring far less power than the postage-stamp LCD screens used commonly in today's mobile devices. A head-up display uses about a microwatt of power. Since head-up display displays project images directly onto the retina, they provide a sharp, clear image regardless of external lighting conditions. Head-up displays require a fraction of the hardware of conventional display devices, allowing for lighter and more elegant mobile devices, in high demand for today's electronics market. Head-up display shows strong potential to replace LCD screens in cell phones, handheld computers, handheld gaming systems, and eventually even larger computers such as laptops
APPLICATIONS
The following applications are where the majority of these displays are used:
Law Enforcement, Medical, Military, Service Technicians, Automotive Technicians, Non-destructive Testing, Security, Test and Measurement, Video production, Mobile Computing, Consumer video.
Head-Up displays were pioneered for fighter jets and later for low-flying military helicopter pilots, for whom information overload was a significant issue, and for whom changing their view to look at the aircraft's instruments could prove to be a fatal distraction.
CONCLUSION
As with most hi-tech electronics, head-up displays are set to become smaller and lighter. MicroOptical is working towards a model that will look no different to a normal pair of glasses. In the near future, head-up displays will be available with wi-fi and Bluetooth connectivity, allowing user's to surf the web and check their email on the move.
There will also be devices that will create full colour images that look bigger than a cinema screen, from a tiny head-mounted or handheld device. This will open up applications such as augmented vision and augmented reality.
HEAD-UP-DISPLAY.docx (Size: 26.18 KB / Downloads: 37)
ABSTRACT
A head-up display system projects an image directly onto the human retina with low-energy lasers or LCDs. Head-up displays can give the user ' the illusion of viewing a typical screen-sized display hovering in the air several feet away. In principle the technology can provide full-color, high¬resolution dynamic displays, but in practice the components necessary to achieve the full potential of the technology are either highly expensive. ; Although the technology was invented by the University of Washington in the Human Interface Technology Lab (HIT) in 1991, development did not begin until 1993; the technology still needs much refinement and has only been commercialized in specialized sectors of the display market such as automobile repair and some parts of the military.
INTRODUCTION
Our window into the digital universe has long been a glowing screen perched on a desk. It's called a computer monitor, and as we stare at it, light is focused into a dime-sized image on the retina in the back of our eyeball. The retina converts the light into signals that percolate into your brain via the optic nerve.
Here's a better way: paint the images themselves directly onto your retina, and eliminate that bulky, power-hungry monitor altogether. To paint the images, use tiny semiconductor lasers or special light-emitting diodes, one each for the three primary colors (red, yellow, and blue), and scan their light onto the retina, mixing the colors to produce the entire palette of human vision. Short of tapping into the optic nerve, there is no more efficient way to get an image into your brain.
PRINCIPLE
Head-up display have now become so compact and lightweight that an emerging use is for displaying information to workers on site locations such as power stations, airports and events. A new breed monocular head¬up displays (HUD) cater for this application.
These displays are discreet and easy to use and are being used in the field by engineers, security and police forces.
Projection methods
The most common means by which current HUDs are implemented is to project the image onto a clear glass optical element ('combiner'). Traditionally, the source for the projected image has been a Cathode Ray Tube (CRT), however newer image sources based on micro-display technologies are now being introduced. Micro-display technologies that have been demonstrated include Liquid Crystal Display (LCD), Liquid Crystal On Silicon (LCOS), Digital Micro Mirrors (DMDs), Organic Light-Emitting Diode (OLED) and Laser.
ADVANTAGES
The head-up display is highly efficient with respect to power consumption, requiring far less power than the postage-stamp LCD screens used commonly in today's mobile devices. A head-up display uses about a microwatt of power. Since head-up display displays project images directly onto the retina, they provide a sharp, clear image regardless of external lighting conditions. Head-up displays require a fraction of the hardware of conventional display devices, allowing for lighter and more elegant mobile devices, in high demand for today's electronics market. Head-up display shows strong potential to replace LCD screens in cell phones, handheld computers, handheld gaming systems, and eventually even larger computers such as laptops
APPLICATIONS
The following applications are where the majority of these displays are used:
Law Enforcement, Medical, Military, Service Technicians, Automotive Technicians, Non-destructive Testing, Security, Test and Measurement, Video production, Mobile Computing, Consumer video.
Head-Up displays were pioneered for fighter jets and later for low-flying military helicopter pilots, for whom information overload was a significant issue, and for whom changing their view to look at the aircraft's instruments could prove to be a fatal distraction.
CONCLUSION
As with most hi-tech electronics, head-up displays are set to become smaller and lighter. MicroOptical is working towards a model that will look no different to a normal pair of glasses. In the near future, head-up displays will be available with wi-fi and Bluetooth connectivity, allowing user's to surf the web and check their email on the move.
There will also be devices that will create full colour images that look bigger than a cinema screen, from a tiny head-mounted or handheld device. This will open up applications such as augmented vision and augmented reality.