What is a HUD display? How many types are there? Effects of HUD screens on cars

What is a HUD display?

Define

The HUD (Head Up Display) screen is a display screen on the steering wheel, which displays information such as the dashboard available on the vehicle in line with the driver’s field of view, so that they do not have to look down. cause distraction.

Currently on the market there are 2 main types of HUD screens, that are HUD using GPS and HUD using OBD 2 port with the following different characteristics:

	HUD screen using GPS	HUD monitor using 2 . OBD port
Characteristic	Use GPS satellite signals to determine the speed and distance of the vehicle.	Connect the vehicle’s OBD 2 (On-board Diagnostics) port to display vehicle parameters directly from the system.
Advantage	Easy to use, suitable for a variety of vehicles whether old or new. Real-time vehicle speed display is better than OBD 2 port.	Easy to install, universal for many new models. Full display of vehicle parameters.
Defect	Other parameters on the vehicle cannot be displayed because the system cannot be connected. Speed ​​information only shows well in good weather conditions and long distances.	Cannot be installed on vehicles without OBD 2 port. Cannot be displayed if the HUD’s decoder is not compatible with the signal from the vehicle’s OBD 2. Display speed lags relative to the ODO clock.

Structure and working principle

The structure of the HUD screen consists of 3 main parts: the projector set, the link set and the computer. Each part will have different uses:

• The projector has the function of creating a mirror image of the information to be displayed.
• The linker functions to redirect the data to display in the driver’s field of view.
• The computer has a connection function between the projector and the data to be transferred.

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In it, all information from the vehicle’s parameters to the view in front of the vehicle, the distance between the vehicles traveling on the road is taken from the system data, through the computer and the linker, will be displayed. on the projector screen in line with the driver’s field of view.

Parameters are displayed

The content displayed on the HUD screen is the most important factor that reflects the use and benefits of this device. More specifically, the HUD screen will display the following parameters:

• Vehicle speed: Information about the current speed of the vehicle will help the driver easily adjust the speed accordingly. In addition, vehicle speed history is also stored to provide information and collate when needed.
• Engine rpm: Indicates the rpm status of the engine. Users can set up an alert when the rpm reaches the limit, avoiding high rpm that harms the engine and consumes fuel.
• Coolant temperature: Coolant has the role of regulating the engine’s temperature, ensuring stable engine operation. This display information will help the operator easily control the temperature of the water, and issue an alarm if the water temperature is higher than 115 degrees Celsius.
• Distance traveled: The distance traveled by the vehicle will be recorded and displayed as kilometers.

• Fuel consumption: Along with displaying the distance traveled, the fuel consumption will show how much fuel is consumed during this distance, from the beginning of the journey to the end.
• Overspeed warning: The HUD display will notify the operator that the pre-set speed is being exceeded by emitting a chime and flashing indicator lights.
• Vehicle voltage: When the voltage of the battery is low (below 12V), the screen will display a message for the user to know and have solutions to increase the life of the battery.

Pros and cons of the HUD . screen

The HUD screen has the following advantages and disadvantages:

Advantage	Defect
Modern, convenient, help a lot for the driver. Support for observing and ensuring visibility while driving while still being able to receive information such as vehicle speed, rpm, engine indicators, coolant temperature, … without having to bend. down. Easy way to install.	All information communicated from the HUD is displayed on the windshield surface, which sometimes obstructs the view. Warning sounds and lights can distract the driver while driving, causing danger.

The effect of the HUD screen on the car

Displays the distance the vehicle is traveling

The HUD system can be installed on a variety of windshields, helping to recreate the view of the road ahead of which the vehicle is moving.