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Head-up display system and method with eye movement tracking function

A head-up display system and eye tracking technology, applied in character and pattern recognition, optics, instruments, etc., can solve the problems of vehicle windshields that cannot be integrated with display equipment, low energy utilization rate of infrared laser diodes, and low diffraction efficiency, etc. Achieve the effect of improving energy utilization, small divergence angle, and improving diffraction efficiency

Active Publication Date: 2020-09-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this system is a wearable display device, and the display device cannot be integrated on the vehicle windshield, and the near-infrared holographic grating used for eye tracking is integrated with the visible light holographic grating used for HUD display through angle multiplexing. On the HUD film, there are problems of low diffraction efficiency and large volume
In addition, the energy utilization rate of the infrared laser diode is low and the energy consumption is large

Method used

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  • Head-up display system and method with eye movement tracking function
  • Head-up display system and method with eye movement tracking function
  • Head-up display system and method with eye movement tracking function

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Experimental program
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Effect test

Embodiment 1

[0049] see figure 1 , which shows a head-up display system with eye-tracking function, the system includes:

[0050] An image source 100a, configured to generate a target image;

[0051] a scattering screen 110, receiving the target image and scattering the target image to the grating combiner 130 described below;

[0052] a grating combiner 130 for diffracting the target image to the eyes of the user 160;

[0053] A near-infrared point light source 120 for emitting near-infrared light to the following near-infrared diffractive optical element 200;

[0054] A near-infrared diffractive optical element 200, configured to convert the near-infrared light into a scattered light beam and diffract it to the face or eyes of the user 160; and

[0055] The near-infrared detector 150 is configured to receive near-infrared images reflected by the face or eyes of the user 160 , and the near-infrared images are used to assist driving and / or adjust the spatial position of the target image d...

Embodiment approach

[0056] According to another preferred embodiment of the present invention, the image source 100a includes CRT, LCD, LED or DMD. Preferably, the scattering screen 110 is frosted glass, frosted paper or a holographic screen. Preferably, the grating combiner 130 includes a holographic grating, a micro-nano grating or a diffraction grating. Preferably, the grating combiner 130 is independent from the windshield 140 or integrated into the windshield 140 .

[0057] Preferably, the grating combiner 130 is a layered stack structure or a multiplexing structure. Preferably, the near-infrared diffractive optical element 200 is square, circular, rectangular or trapezoidal.

[0058] According to yet another preferred embodiment of the present invention, the near-infrared diffractive optical element 200 and the grating combiner 130 are integrated together or arranged independently of each other. It can be understood that when the grating combiner 130 and the near-infrared diffractive opti...

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Abstract

Provided is a head-up display system with an eye movement tracking function, comprising: an image source for generating a target image; a scattering screen, used for receiving the target image and scattering the target image to the grating combiner; a grating combiner, used for diffracting the target image to the eyes of the user; a near-infrared point light source, used for emitting near-infraredlight to the following near-infrared diffractive optical element; a near-infrared diffractive optical element, used for converting the near-infrared light into scattered light beams and diffracting the scattered light beams to the face or eyes of the user; and a near-infrared detector, used for receiving a near-infrared image reflected by the face or eyes of the user, and the near-infrared imageis used for assisting driving and / or adjusting the spatial position of a target image diffracted to the eyes of the user. The system is high in diffraction efficiency, small in size, high in near-infrared point light source energy utilization rate and capable of reducing power consumption.

Description

technical field [0001] The invention relates to a head-up display system and method with an eye-tracking function, and belongs to the field of display technology. Background technique [0002] Head Up Display (HUD) for short, also known as head-up display system, is a technology that projects various vehicle information and navigation information outside the windshield. [0003] The advanced driver assistance system (ADAS) in the field of head-up display has become a new research hotspot. The commonly used technical means in advanced driver assistance systems is eye tracking technology or driver tracking technology, which provides real-time information feedback to the vehicle driver by recognizing the near-infrared images reflected by the driver's face or eyes. [0004] For example, the patent US20160150218A1 discloses a combined structure for a head-up display (HUD) system and a driver monitoring system. The combined structure includes: a HUD system, which includes a first...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/01G02B27/00G06K9/00
CPCG02B27/0101G02B27/0093G06V40/18G06V20/597
Inventor 刘娟吕振律
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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