Touch Display Insulation Recess with Obtuse Angles
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Solution Overview
Problem
Current light extraction structures in display panels, utilizing two layers of organic materials with low refractive indices, are limited in improving light exiting efficiency due to the restricted increase in refractive index, which hampers the enhancement of external quantum efficiency.
Innovation Solution
A display panel design featuring a touch layer with a first insulation layer of inorganic material and a second insulation layer of organic material, where the touch electrodes are positioned in recesses with obtuse angles, forming an inclined interface that increases the refractive index difference, thereby enhancing light exiting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If two layers of organic material with low refractive indices are used to form an inclined interface, then light extraction efficiency is improved, but the improvement is limited due to restricted refractive index increase
Solution Approach 1:
The patent combines inorganic material (first insulation layer with higher refractive index) and organic material (second insulation layer with lower refractive index) to form a composite light extraction structure. This composite approach overcomes the limitation of using only organic materials, enabling a larger refractive index difference and thus more effective light extraction enhancement.
Solution Approach 2:
The patent changes the refractive index parameter by introducing inorganic material with a higher refractive index (first insulation layer) combined with organic material of lower refractive index (second insulation layer). This parameter change creates a significant refractive index difference at the interface, substantially improving light extraction efficiency beyond what organic materials alone can achieve.
2Reliability
If a light extraction structure with inclined interface is formed using organic materials, then external quantum efficiency is enhanced, but the enhancement is insufficient due to limited refractive index increase
Solution Approach 1:
The patent employs a composite structure of inorganic first insulation layer and organic second insulation layer to achieve a larger refractive index difference. This composite material approach directly addresses the insufficiency of using only organic materials, providing both the needed refractive index contrast and the resulting external quantum efficiency enhancement.
Solution Approach 2:
The patent modifies the refractive index parameter by selecting inorganic material with higher refractive index for the first insulation layer and organic material with lower refractive index for the second insulation layer. This parameter optimization creates sufficient refractive index difference to substantially improve external quantum efficiency, overcoming the limitation of small refractive index increases in pure organic material structures.
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 effectively improves light exiting efficiency by creating a significant refractive index difference at the interface, leading to enhanced light extraction and reduced thickness of the display panel.
Implementation Method 1
By combining an organic layer having a low refractive index and an organic layer of a high refractive index to form an inclined interface, light is converged and efficiency is improved
Data Source
AI summary
A display panel disclosed by the present application includes: a base; a display layer, wherein the display layer includes light emitting units; and a touch layer, including a first insulation layer, a touch electrode layer, and a second insulation layer sequentially stacked, wherein the touch electrode layer includes touch electrodes. A first aperture is defined in a portion of the touch electrodes corresponding to the light emitting units. A first recess is defined in a portion of the first insulation layer corresponding to a gap between adjacent two of the light emitting units. An included angle between a sidewall of the first recess and a bottom surface of the first recess is an obtuse angle.