Display Panel Light-Condensing Micro-Lens Brightness
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Solution Overview
Problem
Organic electroluminescent display panels face challenges in achieving sufficient brightness due to limitations in light condensation and reflection management.
Innovation Solution
A display panel design incorporating a light-condensing layer with micro-lenses and a light-filtering layer having a higher refractive index, which converges and filters light emitted by light-emitting elements, reducing external light reflection and enhancing brightness without narrowing the light-emitting range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-condensing layer with micro-lenses is added to concentrate light, then brightness is improved, but device complexity increases
Solution Approach 1:
The light-condensing layer is divided into multiple micro-lenses arranged in an array, where each micro-lens independently concentrates light from corresponding light-emitting elements. This segmentation allows the system to achieve effective light condensation while keeping individual lens structures simple and manufacturable.
Solution Approach 2:
The light-filtering layer with higher refractive index acts as an intermediary between the light-condensing layer and the external environment. It further concentrates light through refraction while filtering out external light, thereby enhancing brightness without requiring more complex lens structures.
2Illumination intensity
If a light-filtering layer with higher refractive index is added to reduce external light reflection, then brightness is improved, but device complexity increases
Solution Approach 1:
The light-filtering layer utilizes a material with a higher refractive index compared to the light-condensing layer. This parameter change (refractive index) enables the layer to concentrate light through refraction and filter external light, thereby improving brightness without adding complex structural elements.
3Illumination intensity
If micro-lenses are used to concentrate light, then light-emitting range is narrowed, but brightness is improved
Solution Approach 1:
The light-filtering layer extends the optical control into a new dimensional aspect by utilizing refractive index differences to concentrate light vertically (through the thickness of the layer) while maintaining horizontal light-emitting coverage. This allows brightness enhancement without significantly narrowing the lateral light-emitting range.
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 significantly increases the brightness of the display panel by concentrating light and reducing external light reflection, while maintaining the light-emitting range, thus improving display effectiveness.
Implementation Method 1
a light-condensing layer, provided on a side of the light-emitting layer away from the driving backplane and having a plurality of micro-lenses, one of the light-emitting elements being provided to correspond to at least one of the micro-lenses in a direction perpendicular to the driving backplane
Implementation Method 2
the micro-lens can converge at least a portion of light emitted by a corresponding light-emitting element
Implementation Method 3
a light-filtering layer, covering the light-condensing layer and including a plurality of light-filtering parts, one of the light-filtering parts being provided to correspond to one of the light-emitting elements in the direction perpendicular to the driving backplane, and the light-filtering part covering at least one of the micro-lenses, wherein a refractive index of each of the light-filtering parts is greater than a refractive index of the light-condensing layer
Data Source
AI summary
The display panel includes a driving backplane, light-emitting layer, light-condensing layer and light-filtering layer. The light-emitting layer is provided on a side of the driving backplane and includes light-emitting elements. The light-condensing layer is provided on a side of the light-emitting layer away from the driving backplane and has micro-lenses, and one light-emitting element corresponds to at least one micro-lens in a direction perpendicular to the driving backplane. The light-filtering layer covers the light-condensing layer and includes light-filtering parts, one light-filtering part corresponds to one light-emitting element in the direction perpendicular to the driving backplane, and the light-filtering part covers at least one micro-lens. A refractive index of the light-filtering part is greater than that of the light-condensing layer, and the micro-lens can converge at least a portion of light emitted by a corresponding light-emitting element.