In-Vehicle Display Device Dynamic Low-Transmissivity Area Ratio
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Solution Overview
Problem
In-vehicle head-up displays face challenges in maintaining visibility and safety due to the varying brightness and color tone of the real-space scene ahead, which can decrease the visibility of superimposed images, making it difficult to transmit information effectively to the driver.
Innovation Solution
An in-vehicle display device with a combination of transparent and low-transmissivity display parts, where the area ratio of the low-transmissivity part to the transparent part is adjusted based on specific conditions, such as vehicle position or object detection, to ensure that critical information is displayed in the low-transmissivity area, reducing the impact of real-space brightness and color tone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If images are superimposed on the real-space scene ahead of the vehicle by means of the in-vehicle head-up display, then information can be transmitted to the driver, but the visibility of the images is easily decreased by the brightness and color tone of the real-space scene
Solution Approach 1:
The display device is divided into two distinct regions: a transparent display part for superimposing images on the real-space scene, and a non-transparent display part for displaying images that should not be superimposed. This segmentation allows different types of information to be displayed with appropriate visibility characteristics, resolving the contradiction between information transmission and visibility maintenance.
Solution Approach 2:
Different parts of the display device have different light transmissivity properties tailored to their specific functions. The transparent display part allows light transmission for scenes that benefit from real-space context, while the non-transparent display part blocks light for images where visibility would be compromised by superimposition, creating local quality variations that optimize overall display effectiveness.
2Illumination intensity
If the area of the non-transparent display part is increased to improve visibility of critical images, then visibility is enhanced, but the area available for transparent display and real-space viewing is reduced
Solution Approach 1:
The boundary between the transparent and non-transparent display parts is not fixed but can be dynamically adjusted based on driving conditions, vehicle state, and the importance of information to be displayed. This dynamic adjustment allows the system to optimize the allocation of display area between transparent and non-transparent regions, enhancing visibility of critical images while preserving sufficient area for transparent display when needed.
3Loss of information
If images representing the space around the vehicle are displayed, then useful information is provided, but the visibility is easily decreased by the brightness and color tone of the real-space scene ahead
Solution Approach 1:
Images representing the space around the vehicle, which are not suitable for superimposition on the real-space scene, are extracted from the transparent display part and placed in the non-transparent display part. This extraction removes these images from the harmful environment of real-space light interference, ensuring their visibility is not degraded by brightness and color tone variations in the forward scene.
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
This solution allows for the effective display of information that is not suitable for superimposition on the real-space scene ahead, ensuring visibility and safety by isolating critical images from the distracting effects of real-space brightness and color tone, thereby enhancing driver awareness and safety.
Implementation Method 1
a transparent display part through which a light from a real space ahead of a vehicle transmits
Implementation Method 2
a low-transmissivity display part a light transmissivity of which for a light from the real space is lower than a light transmissivity of the transparent display part
Data Source
AI summary
One embodiment of an in-vehicle display device includes: a display unit that includes a transparent display part and a low-transmissivity display part, and that changes an area ratio of an area of the low-transmissivity display part to an area of the transparent display part; an image capturing unit that captures a space around the vehicle as an image; and a first display control unit configured to control the display unit such that the area ratio is increased when a predetermined condition is satisfied as compared to when the predetermined condition is not satisfied, and the image captured by the image capturing unit is displayed in the low-transmissivity display part after the area ratio has been increased.