Display Panel Light Adjustment Units for Large-Angle OLED Light
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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 improved light extraction by reducing the angle of light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If organic light emitting diode (OLED) is used as a light emitting device, then self-illumination is achieved and additional light source is not required, but large-angle light is limited to interior of the display panel and cannot exit the display panel
Solution Approach 1:
A light adjustment structure layer is introduced as an intermediary between the light emitting device layer 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 while maintaining the self-illumination advantage of OLED technology.
Solution Approach 2:
The light adjustment units are arranged in a matrix pattern with through-holes that create additional optical pathways in the vertical dimension. This dimensional approach allows large-angle light to be redirected outward through the light adjustment structure layer, transforming the light extraction problem from a two-dimensional surface issue to a three-dimensional spatial solution.
2Use of energy by moving object
If light adjustment structure layer is added to improve light extraction efficiency, then power consumption is reduced, but device structure becomes more complex
Solution Approach 1:
The light adjustment structure layer is segmented into multiple light adjustment units arranged in a matrix pattern. Each unit contains through-holes positioned to correspond with light emitting devices below, creating discrete, manageable segments that collectively improve light extraction efficiency while maintaining a systematic and organized structure.
Solution Approach 2:
The light adjustment structure layer functions as a composite optical component combining multiple functional elements: the light adjustment units with specific refractive indices, the through-holes for light passage, and the matrix arrangement pattern. This composite structure integrates multiple functions into a single layer that addresses both light extraction and structural organization.
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 light extraction efficiency, reducing power consumption and improving the display panel's performance by adjusting the light path of large-angle light emitted from the light emitting devices, 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 improved light extraction by reducing the angle of light emission
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.