DLPA073A September   2016  – September 2016 DLP2010 , DLPC2607 , DLPC3430 , DLPC3435

 

  1.   TI DLP Pico Technology for Aftermarket Head-up Displays
    1.     Trademarks
    2. 1 Introduction
    3. 2 Applicable Documents
    4. 3 Terminology
      1. 3.1 Types of AM-HUD
      2. 3.2 HUD Terminology
    5. 4 AM-HUD Key Requirements
      1. 4.1 Field of View
      2. 4.2 Resolution
      3. 4.3 Virtual Image Distance
      4. 4.4 Eyebox
      5. 4.5 Image Brightness
    6. 5 AM-HUD System
    7. 6 AM-HUD System Design Trade-Offs
      1. 6.1 Light Output vs. Eyebox and Field of View
      2. 6.2 Combiner and Diffuser Specification
        1. 6.2.1 Diffuser Screen Dimensions
        2. 6.2.2 Combiner Specification
      3. 6.3 Projection Unit Specification
    8. 7 Electronic System
    9. 8 Conclusions and Getting Started
  2.   Revision History

4.1 Field of View

The field of view (FOV) (Figure 6) is an important specification of an AM-HUD system. A wider field of view is desirable so that all required and useful information can be displayed without clutter, and in a way which is easily read by the driver. At the same time, the FOV should not be so wide that the driver is distracted from monitoring their car's current lane in the road. Ideally, the virtual image should be contained within the car's current lane width at a reasonable distance ahead.

Typically, lanes of US highways are 3.7 meters wide. A virtual image with a 12° FOV will span across a 3.7 meter lane at a distance of nearly 18 meters in front of the driver. The preferred horizontal field of view (HFOV) is between 6° to 12°, and a vertical field of view (VFOV) between 3° to 6°.

The total light output required from the HUD projection unit increases with FOV, so the increased power demand of a wider FOV should be taken into consideration.

image6.pngFigure 6. Field of View (FOV)