Current HUD is accessible FOV is 7 go to 8 degrees or smaller, can forwardly image of projectile ” of the “ on the 2 road to 2.5 meters. These image look like the engine lid that floats in the car to go up. People hope makes through AR HUD image projects farther place, make image is accomplished truly increase and interact with the driver’s eye shot.

 

Enhance reality (AR) look up show (HUD) it is a car what appear in the industry is new a great invention. Now nowadays, this technology got car manufacturer and the attention of one class supplier, enter the phase that develops AR windshield HUD actively.

 

The wide visual field that true AR shows to need has at least 10 to spend (FOV) and rice or 7.5 bigger fictitious picture are apart from (VID) . FOV expresses to be the indication size of the unit in order to spend, and the distance that VID shows image is umbriferous. In car HUD, VID states image appears in the distance on road.

 

The concept of AR technology backside is on real world overlay counts word information, the knowledge that enhances a driver to leave a scene to becoming improves his to drive experience. FOV is bigger, fictitious attempt is longer like the distance, indication result is better also.

 

 

Graph 1: AR shows give a demonstration

 

All the time since, designing AR to indicate two when be faced with the biggest challenges is brightness and the problem with laden solar energy. AR indicates need as far as possible wide and bright, this needs to give out a large number of light like appearance. The driver still needs to project image far as far as possible on road. Current HUD is accessible FOV is 7 go to 8 degrees or smaller, and can forwardly image of projectile ” of the “ on the 2 road to 2.5 meters. These image look like the engine lid that floats in the car to go up. People hope makes through AR HUD image projects farther place, make image is accomplished truly increase and interact with the driver’s eye shot. To lengthen the distance of fictitious image, design enlarge multiple is 25 to the system of 30 times already common occurance, but such design malpractice is solar energy load (namely solar energy) go up into face plate resembling appearance at HUD centrally the meeting when minimum piece area has produced quantity of heat of big negative charge. This kind of high multiple puts congress to will become tend of face plate resembling appearance to be apart from the place with closer focus of HUD optics parts of an apparatus, the concentration that increases unit area solar energy thereby is spent, if pursue,2 are shown. Ask an attention, this is not environmental temperature problem, get focusing and the radial more that enter a system as a result of solar energy however (the dazzle defect wave as a result of AR HUD implement bigger) , produced the technical issue of overheat thereby.

 

 

Graph 2: HUD optical parts of an apparatus magnifies solar energy load scattering screen or filmy transistor (TFT) on face plate

 

Use the structure of intermediate scattering screen with DLP® distinctive technology, can design the HUD that can bear to be magnified by sun’s rays place produces thermic load. If the graph is shown 3 times, the HUD that is based on DLP technology can project image on scattering screen, HUD optical parts of an apparatus magnifies his and project next on windshield, in presenting the line of vision in the driver thereby. In TFT HUD, TFT face plate receives HUD optics parts of an apparatus repeatedly, replaced scattering screen and auxiliary electronic parts.

 

 

Graph 3: Be based on the HUD framework give typical examples of DLP technology

 

To understand better why scattering screen has an advantage, we might as well the physics that will see scattering screen and traditional TFT face plate is characteristic (graph 4) . The two large main dominant positions that scattering screen has depend on can work in higher temperature, in addition scattering screen won’t absorb many sun incident and visible spectrum, this are more important. (spectral infra-red [IR] and ultraviolet [UV] part is filtered very easily. )

 

 

Graph 4: TFT and scattering implement

 

Incident solar energy load arrives through focusing of HUD optical parts of an apparatus scattering implement on, when resembling be being used at TFT face plate same. But in scattering implement in, transmission is smooth actually by diffuse, removed the enlarge effect of HUD optics parts of an apparatus, because this can be answered more simply,heat up laden problem. Pass TFT face plate, solar energy is absorbed, and raise the working temperature of face plate easily above of the biggest rating. Be the advantage that load of this kind of solar energy brings and its outstanding brightness, contrast and colour gamut, manufacturer of the car that help strength and one class supplier are designed and roll out new generation AR HUD.