Display Panel Light Adjustment Structure for Higher Light Extraction
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Solution Overview
Problem
Current organic light emitting display technology suffers from low light extraction efficiency due to large-angle light being restricted within the display panel, which affects power consumption and overall performance.
Innovation Solution
A display panel with a light adjustment structure layer comprising light adjustment units and a dielectric layer, where the light adjustment units have a smaller refractive index than the dielectric layer, and include a through hole overlapping a light emitting device, allowing for refraction and adjustment of light paths to reduce total reflection and enhance light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If organic light emitting diode is used as light emitting device, then self-illumination is achieved and additional light source is not required, but large-angle light is limited to interior of display panel and cannot exit to contribute to light emitting of pixels
Solution Approach 1:
A light adjustment structure layer is introduced as an intermediary between the light emitting device and the external environment. This layer includes light adjustment units with through-holes that mediate the path of large-angle light, enabling it to exit the display panel and contribute to pixel illumination, thereby improving light extraction efficiency without increasing power consumption
Solution Approach 2:
The light adjustment units utilize refractive index differences between materials to change the propagation parameters of light. By designing structures with specific refractive indices, the patent transforms the trajectory of large-angle light, converting it from trapped paths to useful emission paths that contribute to display brightness
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 improves light extraction efficiency by adjusting the light paths of large-angle emissions, reducing power consumption and enhancing the display panel's performance by allowing more light to contribute to pixel illumination.
Implementation Method 1
each of the plurality of light adjustment units has a smaller refractive index than the dielectric layer... allowing for refraction and adjustment of light paths
Data Source
AI summary
Provided is a display panel, including: a base substrate, a light emitting device layer provided on the base substrate and including light emitting devices, and a light adjustment structure layer provided at a side of the light emitting device layer facing away from the base substrate and including light adjustment units and a dielectric layer covering the light adjustment units. Each light adjustment unit has a smaller refractive index than the dielectric layer and includes a light adjustment sub-section and a through hole penetrating the light adjustment unit in a direction perpendicular to the base substrate. The through hole overlaps one light emitting device, and the light adjustment sub-section surrounds the through hole. For one light adjustment unit, a thickness of the light adjustment sub-section gradually increases in a direction from the through hole to the light adjustment sub-section.