Transparent LED and LC Pixel Display for Vehicle Glare Reduction
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Solution Overview
Problem
Conventional display and light blocking technologies fail to effectively address glare issues in vehicles, particularly for drivers and passengers, and lack the ability to dynamically control light transmission and emission for enhanced visibility and display purposes.
Innovation Solution
A display screen incorporating a liquid crystal (LC) array layer and a transparent LED layer, controlled by a controller that selectively darkens LC pixels and triggers LED pixel emission, allowing for glare reduction and dynamic display functionality, including navigation messages and virtual vision enhancements, without a backlight or opaque backing, and can be curved for flexible integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional display and light blocking technologies are used, then the structure is simple, but glare issues cannot be effectively addressed and dynamic light transmission control is lacking
Solution Approach 1:
The patent combines a liquid crystal array layer and a transparent LED layer into a single integrated display screen assembly. The LC layer handles light blocking and glare reduction, while the LED layer provides active light emission for displays. This merging of two functional layers into one unified structure enables simultaneous glare control and dynamic display capabilities without requiring separate systems, thus addressing the technical contradiction between reducing glare and maintaining device simplicity.
Solution Approach 2:
The display screen is designed to perform multiple functions: it can block glare by controlling the LC layer, display information through LED pixel emission, and dynamically adjust light transmission. The controller manages both the LC array and LED layer to achieve various operational modes including glare reduction, interior display, and exterior display. This multi-functionality allows a single device to address multiple issues simultaneously, resolving the contradiction between effective glare control and device complexity.
2Illumination intensity
If light is emitted from LED pixels, then display capability is enhanced, but light may shine onto users causing glare
Solution Approach 1:
The controller selectively controls individual LC pixels to darken only in the specific area between the LED pixels and the user's head area, while allowing other areas to remain transparent. This localized darkening blocks glare directed at the user while maintaining display brightness in other regions, thus resolving the contradiction between enhanced display capability and glare prevention.
Solution Approach 2:
The LC array layer acts as an intermediary between the LED layer and the user. When LED pixels emit light, the controller can activate corresponding LC pixels to darken and block the light path to the user's head area, while allowing the light to pass through to other areas. This intermediary layer enables simultaneous achievement of bright display and glare reduction.
3Adaptability or versatility
If the entire LC array is darkened for projection surface, then projection capability is enabled, but interior display and glare reduction functionality is lost
Solution Approach 1:
The display screen provides dynamic control of the LC array, allowing it to switch between different operational modes. The controller can darken the entire LC array to create a projection surface, or selectively darken only specific pixels for glare reduction while maintaining transparency for interior displays. This dynamic adaptability enables the system to perform multiple functions including projection, glare control, and interior display, resolving the contradiction between projection capability and light transmission.
4Measurement precision
If selective darkening of LC pixels is implemented, then glare control and display precision are improved, but device complexity increases
Solution Approach 1:
The display screen divides the control function into pixel-level segments, where each LC pixel and LED pixel can be independently controlled. The controller manages individual pixels based on their spatial coordinates and functional requirements, enabling precise glare control and display. This segmentation approach allows for high precision control while maintaining a relatively simple controller architecture through systematic pixel management.
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 effectively reduces glare, enhances interior and exterior display capabilities, and improves visibility by matching LED and LC pixel emissions, providing a flexible and efficient light management system for vehicles and other applications.
Implementation Method 1
A controller is provided and configured to selectively darken a set of LC pixels to limit passage of light from a glare source
Implementation Method 2
A controller is provided and configured to selectively trigger emission of light from a selection of LED pixels
Implementation Method 3
transparent LED layer having a plurality of LED pixels
Data Source
AI summary
A display or light blocking screen includes a liquid crystal (LC) array layer having a plurality of LC pixels, and a transparent LED layer having a plurality of LED pixels. A controller is operatively connected to the LC array layer and the transparent LED layer. The controller is configured to selectively trigger emission of light from a selection of the LED pixels, and to selectively darken a selection of the LC pixels that correspond directly to the selection of LED pixels. Therefore, the emitting LED pixels and the darkened LC pixels match and light is emitted from the LED pixels in substantially the opposite direction of the LC array layer. The display screen, or different aspects thereof, may be operatively incorporated into one or more windows of a vehicle, may be a standalone unit, or may be incorporated into a building.