Transparent OLED Light Blocking Member for Reflection Reduction
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Solution Overview
Problem
Transparent OLED devices face reduced visibility due to light reflection from their lower surfaces, which affects the visibility of images displayed through them, especially when used in closed states.
Innovation Solution
Incorporating a light blocking member with openings on the lower surface of the display panel, extending from pixel regions to transparent regions, reduces external light reflection and improves transmissivity by using light blocking materials like carbon black or titanium nitride oxide within a resin, such as siloxane resin, to minimize light interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a transparent OLED device is used to transmit images, then transparency and image transmission are improved, but visibility is reduced due to light reflection from the lower surface
Solution Approach 1:
A light blocking member is introduced as an intermediary element on the lower surface of the transparent OLED device. This member selectively blocks reflected light while allowing the device to maintain its transparent appearance from the front, thereby mediating between the transparency requirement and the harmful reflection effect
Solution Approach 2:
The light blocking member is applied locally only on the lower surface in specific regions, rather than making the entire device opaque. This localized application blocks reflected light from reaching viewers while preserving the overall transparency and aesthetic appearance of the display device
2Object-affected harmful factors
If light blocking materials are added to reduce reflection, then visibility is improved, but device complexity increases
Solution Approach 1:
The light blocking member is implemented as a thin film or coating layer on the lower surface, rather than a bulky three-dimensional structure. This thin-film approach reduces reflection effectively while adding minimal structural complexity and maintaining the device's thin profile
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 enhances visibility and transmissivity of the display panel by reducing external light reflection, allowing for clearer image transmission through the transparent regions, thereby improving the definition and visibility of images displayed through the panel.
Implementation Method 1
a light blocking member 120, which extends from a pixel region I into a transparent region II on the lower surface of the substrate 110
Data Source
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AI summary
A display panel includes a substrate, light emitting structures disposed on an upper surface of the substrate in pixel regions, an encapsulation substrate disposed over the light emitting structures, and a light blocking member disposed on a lower surface of the substrate. The light blocking member has blocking portions corresponding to the pixel regions and openings corresponding to transparent regions.