Tilted Light-Shielding Layer for On-Board Display Substrates
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Solution Overview
Problem
On-board display panels face issues with light beams being projected onto windshields, causing driver distraction, and existing solutions like light control films result in light loss and increased panel thickness.
Innovation Solution
A display substrate with a function layer comprising an organic layer and a light-shielding layer, arranged on pixel units to shield light beams towards a specific direction, reducing light loss and panel thickness by precise alignment without adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light control film is attached onto the display panel to reduce light beams reflected toward user's eyes, then the driver distraction is reduced, but the light loss increases by 20% to 40% and the thickness of the display panel increases
Solution Approach 1:
The light control function is segmented into individual light-shielding layers corresponding to each pixel unit, with each layer having a specific tilt angle to control light in different directions. This allows selective shielding of light toward the windshield while preserving light emission toward the user's eyes, thereby reducing driver distraction without causing significant light loss.
Solution Approach 2:
Different regions of the display panel are assigned different light control properties through the light-shielding layers with varying tilt angles. The light-shielding layer is configured with a specific tilt angle relative to the normal direction of the pixel unit, creating local light control quality that directs light away from the windshield in specific viewing zones while maintaining brightness in other zones.
2Object-affected harmful factors
If a light control film is attached onto the display panel to reduce light beams reflected toward user's eyes, then the driver distraction is reduced, but the thickness of the display panel increases
Solution Approach 1:
The light-shielding layer is merged with the pixel unit structure itself, forming an integrated component during the manufacturing process. The light-shielding layer is formed on the pixel unit and extends in a tilted manner, combining the light control function with the display structure, thereby eliminating the need for separate attached films and reducing overall panel thickness.
Solution Approach 2:
The light control function is achieved by introducing a dimensional aspect through the tilted configuration of the light-shielding layer. Instead of using a flat, thick film, the solution employs a three-dimensional tilted structure that controls light direction through its angular geometry, effectively reducing the thickness requirement while maintaining light control functionality.
3Object-affected harmful factors
If a light-shielding layer with tilted configuration is used to shield light beams toward the windshield, then the light beam projection onto windshield is prevented, but the manufacturing precision requirement increases
Solution Approach 1:
The light-shielding layer is formed during the manufacturing process with pre-calculated tilt angles based on the specific application scenario (vehicle type, display position, windshield angle). The tilt angle is determined in advance using geometric relationships involving the normal direction of the pixel unit, the viewing direction, and the windshield orientation, allowing precise light control to be built into the structure before assembly.
Solution Approach 2:
The tilt angle of the light-shielding layer is adjusted as a key parameter to optimize light control performance. By changing the tilt angle parameter according to different mounting scenarios and windshield configurations, the system achieves precise light direction control without requiring excessive manufacturing precision, as the angle itself becomes the primary control variable.
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
Effectively prevents light beam projection onto windshields, reducing driver distraction and light loss while maintaining panel thickness, by accurately shielding light beams towards the windshield.
Implementation Method 1
the light-shielding layer is arranged on a first portion of each protrusion and configured to shield the light beam toward the first direction among the light beams emitted by the at least one pixel unit
Data Source
AI summary
A display substrate is provided, which includes a base substrate, a plurality of pixel units arranged on the base substrate, and a function layer arranged at a light-emitting side of at least one pixel unit of the plurality of pixel units, wherein the function layer is configured to shield a light beam toward a first direction among light beams emitted by the at least one pixel unit, the function layer includes an organic layer and a light-shielding layer, and the light-shielding layer is arranged on a part of the organic layer, and configured to shield the light beam toward the first direction among the light beams emitted by the at least one pixel unit. An on-board display device and a method for manufacturing the display substrate are further provided.