Vehicle Display Groove Visibility via Polarization Angle
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Solution Overview
Problem
Conventional display devices for vehicles suffer from visibility issues due to the recognition of grooves on the second display unit, even when it is in a non-display state, which can disturb the visibility of the primary display unit and liquid crystal displays.
Innovation Solution
A display device design where the polarization direction of the image display device intersects with the extending direction of grooves on a transparent light guide plate at an angle range of 75° to 105°, allowing the grooves to be switched between display and non-display states based on lighting, and utilizing a polarizing plate to control light polarization and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transparent light guide plate with grooves is used to display patterns, then display versatility is improved, but visibility of the primary display is disturbed when grooves are visible in non-display state
Solution Approach 1:
The patent applies polarization-based optical property changes to make the groove pattern invisible in non-display state. By controlling the polarization direction of light relative to the groove orientation, the pattern can be rendered invisible when not actively displaying, thus eliminating visibility disturbance while maintaining display versatility when needed.
Solution Approach 2:
The patent changes the optical parameters of the light guide plate by controlling polarization direction. When the polarization direction of incident light is aligned parallel to the groove extending direction, the grooves become invisible. This parameter change allows the system to switch between displaying and non-displaying states without physical movement or additional components.
2Adaptability or versatility
If grooves are formed on the light guide plate to create display patterns, then pattern display capability is improved, but the grooves remain visually recognizable causing interference with primary display
Solution Approach 1:
The patent uses polarization-based optical effects to control the visibility of groove patterns. By adjusting the polarization state of light, the grooves can be made invisible when not displaying patterns, preventing interference with the primary display information and maintaining clarity of displayed data.
Solution Approach 2:
The patent introduces dynamic control of light polarization to switch the visibility of groove patterns. The system can dynamically adjust the polarization direction of incident light based on whether pattern display is needed, making the grooves invisible during primary display operation and visible when pattern display is required.
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
Ensures proper visibility by minimizing the recognition of grooves during non-display states, maintaining a high luminance ratio between pattern and surrounding areas, thus enhancing the visibility of vehicle information on the primary display unit.
Implementation Method 1
a transparent light guide plate that is configured to be provided overlapping the image display surface, transmit the light emitted from the image display device
Implementation Method 2
a polarizing plate that is configured to polarize light into light polarized in one direction
Implementation Method 3
a light source for grooves that irradiate an end surface of the transparent light guide plate with light
Data Source
AI summary
A display device includes an image display device that includes an image display surface that emits light polarized in one direction and displays an image; and a superimposing display device that includes a transparent light guide plate that is provided overlapping the image display surface, transmits the light emitted from the image display device, and also has grooves constituting a pattern formed thereon, includes a light source that irradiates an end surface of the transparent light guide plate with light, and is switched between display and non-display of the pattern based on lighting and non-lighting of the light source. A polarization direction of the image display device and an extending direction of the grooves intersect at an angle range of 75° to 105°. Accordingly, the display device can ensure proper visibility.