Touch Display Light Absorbing Layer for Windshield Reflection
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Solution Overview
Problem
In-vehicle organic light emitting displays cause reflected images on windshields, affecting driving safety due to their wide viewing angle and thickness, which limits flexibility and thinness.
Innovation Solution
A touch display device with a stacked structure including a display panel, a touch module with alternating electrode and light absorbing layers, and a light transmitting layer, reducing reflectivity and thickness to prevent reflections and enable bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a conventional light control film with protective layers is used, then light transmission control is achieved, but the thickness increases to 300 μm or more, making flexibility and thinning impossible
Solution Approach 1:
The patent removes the protective layers from the conventional light control film structure, extracting only the essential light-absorbing louver layer. This eliminates the thickness contribution from protective layers and adhesives, enabling the film to achieve thinness below 300 μm while maintaining its core light transmission control function.
Solution Approach 2:
By eliminating rigid protective layers and using a flexible substrate, the patent creates a thin-film light control structure that can be bent and flexed. The thin film design with thickness less than 300 μm enables flexibility that was impossible with conventional thick protected structures.
2Adaptability or versatility
If organic light emitting displays with wide viewing angle are used, then viewing angle is improved, but reflected images are cast on windshields at night, affecting driving safety
Solution Approach 1:
The patent applies light-absorbing material in a localized louver structure with specific angular orientation. This creates directionally selective light absorption that maintains wide viewing angle for legitimate observers while blocking reflected light at specific angles toward the windshield, thus eliminating the harmful reflection effect locally without sacrificing overall viewing performance.
3Adaptability or versatility
If conventional light control film structure with louver layer and protective layers is used, then light transmission adjustment is achieved, but the structure cannot realize flexibility and thinning
Solution Approach 1:
The patent extracts and removes the protective layers and adhesive materials from the conventional light control film structure, retaining only the essential light-absorbing louver layer on a flexible substrate. This simplification eliminates structural complexity while preserving the core light transmission adjustment function, enabling flexibility.
Solution Approach 2:
The simplified structure serves multiple functions: light transmission control, flexibility, and thinness are all achieved by the same streamlined structure without requiring separate protective layers. The single integrated design provides universal functionality that replaces multiple conventional components.
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 reflectivity, improves visibility under strong light, and allows for a thinner, more flexible display that prevents reflections on windshields, enhancing driving safety and enabling curvature.
Implementation Method 1
a light absorbing layer (22) and a second electrode layer (23) sequentially stacked on a surface of the display panel (10)... the light absorbing layer includes a plurality of first sub-light absorbing layers... Under the influence of the light absorbing material, images are visible when viewed at a perpendicular viewing angle. However, as the viewing angle increases, the amount of light transmitted through the LCF will gradually decrease.
Data Source
AI summary
Disclosed is a touch display device and a manufacture method thereof. The touch display device includes a display panel and a touch module stacked together. The touch module includes a first electrode layer, a light absorbing layer and a second electrode layer sequentially stacked on a surface of the display panel. The first electrode layer includes a plurality of first touch electrodes arranged at intervals in a first direction; the light absorbing layer includes a plurality of first sub-light absorbing layers arranged at intervals in the first direction; at least one of the plurality of first sub-light absorbing layers corresponds to at least one of the plurality of first touch electrodes and is on a side of a corresponding first touch electrode facing away from the display panel; and the second electrode layer includes a plurality of second touch electrodes arranged at intervals in a second direction; the first direction intersects the second direction.