Curved Semi-Transparent Reflecting Screen for HUD Ghost Removal
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Solution Overview
Problem
Current head-up display (HUD) systems in vehicles are limited by their inability to provide operating functions, suffer from image distortion and ghosting, especially in bright conditions, and have inadequate integration with the vehicle's dashboard and road scenery, lacking advanced driver monitoring and voice interaction capabilities.
Innovation Solution
A smart in-vehicle head-up display device featuring a host connected to OBD or USB interfaces for vehicle data, a flexible PHOLED display, a curved semi-transparent reflecting screen for improved image projection, a laser projector with MLA, and integrated driver monitoring and voice interaction units, enabling real-time driver state analysis and voice-controlled operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a projector based on LED principle is used to display information, then the driver can see vehicle information, but image ghost appears and display clarity deteriorates in strong light conditions
Solution Approach 1:
The patent introduces a beam splitter as an intermediary component between the projector and the driver's line of sight. The beam splitter optically separates the projected image from ambient light, allowing the display to remain clear and visible even in strong light conditions. This mediator component resolves the contradiction by enabling bright display without compromising image clarity.
2Ease of operation
If information is projected onto glass or coated lens, then the driver can view information without bowing head, but image distortion and ghosting occur
Solution Approach 1:
The beam splitter serves as an intermediary that eliminates the need for projecting directly onto glass or coated lenses. By using the beam splitter to redirect light, the system maintains head-up viewing convenience while avoiding the image distortion and ghosting problems associated with direct projection onto optical surfaces.
3Length of stationary object
If the imaging distance is limited, then the HUD device size is reduced, but the focal length cannot match driving sceneries
Solution Approach 1:
The beam splitter enables the optical system to extend the effective imaging distance without increasing the physical device size. By using optical reflection and redirection through the beam splitter, the system creates a virtual image at a distance that matches driving scenery depth, resolving the contradiction between compact size and focal length matching capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances display clarity, reduces image distortion and ghosting, integrates vehicle information effectively with the dashboard, and provides real-time driver monitoring and voice interaction capabilities, improving driving safety and convenience by addressing existing HUD limitations.
Implementation Method 1
A curved semi-transparent reflecting screen provided in a position opposite to the display device, configured to receive an image displayed by the display device, and display the image on the other side of the semi-transparent reflecting screen
Implementation Method 2
the curved semi-transparent reflecting screen is further configured to display the image after ghost is removed
Implementation Method 3
The flexible display screen, which uses PHOLED (phosphorescent OLED) technology and has a low-consumption, directly visual flexible panel, can effectively overcome the image distortion
Implementation Method 4
Light sources in the display device are converged through the MLA. Diffuse reflection effects of the laser beams through the curved semi-transparent reflecting screen are modulated
Implementation Method 5
reasonably controlling scattering angles of light and ensuring luminance
Implementation Method 6
the display device is a laser projector, configured to project the image through laser beams
Implementation Method 7
The flexible display screen, which uses PHOLED (phosphorescent OLED) technology
Data Source
AI summary
Disclosed is a head-up display device. The head-up display device includes: a host (1), configured to send an image signal to a display device (2); a display device (2) provided at one side of the host (1), configured to display the image signal; a curved semi-transparent reflecting screen (3) provided in a position opposite to the display device (2), configured to receive an image displayed by the display device (2), and display the image on the other side of the semi-transparent reflecting screen (3) at one side of the host (1), wherein the semi-transparent reflecting screen (3) is further configured to display the image after ghost is removed; a voice interaction unit (20) pre-configured in the host (1), and a driver detection device (12) mounted in the host (1). The head-up display device supports voice interaction throughout a process, driver real-time monitoring, and advance warning, and has good display effect.