Composite Display Device Parallax Highlighting for Vehicle Meters
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Solution Overview
Problem
Existing display devices for vehicles, such as meter units, struggle to effectively highlight specific information, particularly when the driver is not looking directly at the display, and fail to create a strong sense of depth or highlight, limiting visibility and recognition of critical warnings or changes in operation states.
Innovation Solution
A composite display device incorporating an optical combiner, a first display unit for virtual images, and a second display unit for real images, with a composite display control unit that creates parallax and differences in size or brightness between the two, allowing for a three-dimensional highlight effect and improved visibility even when the driver is looking away.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a typical display device displays a real image, then the display is simple and easy to implement, but the ability to highlight specific information and create depth perception is limited
Solution Approach 1:
The patent combines a real image display device and a virtual image display device into a single composite display device. The real image is formed on the display screen while the virtual image is projected onto a combiner, and both images are synthesized to be displayed simultaneously. This merging allows the system to provide both the simplicity of real image display and the highlight effects of virtual image display, resolving the contradiction between device simplicity and information emphasis capability.
2Loss of information
If a head up display uses a virtual image, then the display has a feeling of depth, but it is difficult to display specific information in a highlighted state
Solution Approach 1:
The patent merges real image and virtual image display capabilities into a composite display system. The real image component provides straightforward information presentation while the virtual image component overlaid on the combiner provides depth perception and highlight effects. By controlling the synthesis of these two images, the system achieves both depth perception and effective highlight control without the limitations of using only virtual images.
3Ease of operation
If display information is shown in a standard manner, then the display device is simple to operate, but the driver cannot immediately recognize changes or abnormalities when looking away
Solution Approach 1:
The patent applies local quality by creating parallax between the real image and virtual image, causing them to be displayed at different apparent positions. Critical information can be positioned in the virtual image layer which appears at a different depth, making it visible even when the driver's gaze is slightly off-center. This localized positioning strategy maintains simple operation while significantly improving information recognition reliability.
Solution Approach 2:
The patent introduces a depth dimension by combining real image (on the screen plane) and virtual image (projected through the combiner at a different apparent position). This creates a three-dimensional display effect where information can be positioned at different depths and locations, allowing critical alerts to be visible in the peripheral vision or at positions that do not require direct eye contact, thus improving recognition without complicating operation.
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 composite display device enhances the visibility and recognition of display information by creating a stereoscopic effect and highlighting specific information, ensuring the driver is aware of critical notifications even when looking elsewhere, thereby improving the overall display experience and safety.
Implementation Method 1
an optical combiner that reflects and transmits light
Implementation Method 2
an optical combiner that reflects and transmits light
Data Source
AI summary
A composite display device is provided with an optical combiner, a first display unit which displays a virtual image by projecting an image including certain display information to a front surface of the optical combiner, a second display unit which is disposed on a position of a rear surface side of the optical combiner and displays a real image, and a composite display control unit.