Display Device Light-Blocking Layer Against Bezel Reflection
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Solution Overview
Problem
In display devices, the increased area of the display area and decreased bezel area lead to structures in the non-display area being exposed, causing external light to be diffusely reflected and lowering the visibility of the displayed image.
Innovation Solution
The display device incorporates a light blocking layer on the cover substrate that overlaps with the inorganic area in the non-display area on one side and positions the common electrode away from the inorganic area on the other side, preventing external light from being diffusely reflected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display area is increased and the bezel area is decreased, then the display device can provide a larger viewing area and more immersive experience, but structures in the non-display area become exposed and external light is diffusely reflected, lowering the visibility of the displayed image
Solution Approach 1:
The patent introduces a light blocking layer as an intermediary element between the external light source and the exposed structures in the non-display area. This light blocking layer selectively blocks external light from reaching the inorganic area and common electrode, preventing diffuse reflection while allowing the display area to maintain its full size and functionality.
Solution Approach 2:
The patent applies different structural configurations to different regions of the display device. Specifically, the light blocking layer is positioned to cover only the non-display area where exposed structures cause reflection problems, while leaving the display area untouched. This localized approach maintains image quality in the display region while eliminating reflection issues in the non-display region.
2Object-affected harmful factors
If the light blocking layer is added to block external light, then the visibility of the displayed image is improved, but the device complexity and manufacturing process become more complicated
Solution Approach 1:
The patent integrates the light blocking layer into the existing layered structure of the display device, combining it with the cover substrate and other existing components. This merging approach allows the light blocking function to be added without creating a completely separate system, thereby reducing the increase in device complexity while still achieving the desired light blocking effect.
3Ease of manufacture
If the common electrode is positioned to overlap with the inorganic area, then the manufacturing process is simplified, but external light is diffusely reflected from the exposed structures, lowering image visibility
Solution Approach 1:
The light blocking layer serves as a mediator that allows the common electrode to maintain its simplified positioning overlapping with the inorganic area, while simultaneously preventing external light from reaching the exposed structures. This intermediary layer decouples the electrode positioning decision from the light reflection problem, allowing both manufacturing simplicity and image quality to be optimized.
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
This configuration reduces or prevents the visibility of the displayed image from being lowered by external light reflection, enhancing image clarity.
Implementation Method 1
a light blocking layer on the cover substrate, and including: in the non-display area on the first side of the display panel, the light blocking layer overlaps with the inorganic area
Data Source
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AI summary
A display device includes: a display panel including: a plurality of light emitting elements in a display area for displaying an image; and an inorganic area in a non-display area around the display area. Each of the plurality of light emitting elements includes: a pixel electrode; a light emitting layer on the pixel electrode; and a common electrode on the light emitting layer. The display panel includes a first side, a second side opposite to the first side, and a third side connected to the first side and the second side. In the non-display area on the first side of the display panel, the common electrode overlaps with the inorganic area, and in the non-display area on the third side of the display panel, the common electrode is spaced from the inorganic area.