OLED Display Panel Light Gathering Unit for Ambient Light Reflection
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Solution Overview
Problem
The contrast of organic light emitting diode display panels is reduced due to reflection of ambient light, with existing solutions like polaroids and light absorption layers either absorbing too much light or being costly.
Innovation Solution
An organic light emitting diode display panel with a light absorption layer and a light gathering unit, comprising plane convex lenses, that absorbs ambient light incident on the display panel, reducing reflection and enhancing contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a 1/4 wavelength polaroid is attached to the surface of the display parts, then the contrast is increased, but 60% of emitted light is absorbed or lost and the cost is high
Solution Approach 1:
The invention divides the light management function into two separate components: a light absorption layer that selectively absorbs ambient light and a light gathering unit that directs emitted light away from the absorption layer. This segmentation allows each component to perform its function efficiently without the light loss associated with polaroids.
Solution Approach 2:
The light absorption layer is positioned specifically in the pixel defining regions where ambient light reflection occurs, while the light gathering unit is positioned in the pixel regions. This localized arrangement ensures that only ambient light is absorbed without blocking the emitted light from the organic light emitting functional layer.
2Object-affected harmful factors
If an extinction interference layer is added to increase contrast, then the contrast is increased, but a matching relationship between highest occupied molecular orbital energy level and lowest unoccupied molecular orbital energy level must be considered
Solution Approach 1:
The invention replaces the complex quantum mechanical energy level matching mechanism of extinction interference layers with a simpler geometric optical approach using a light gathering unit. The light gathering unit uses refraction and total internal reflection principles to redirect light, eliminating the need for precise energy level matching between different layers.
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 effectively reduces ambient light reflection, thereby increasing the contrast of the display panel without significant light loss, using a black light absorbing material and a light gathering unit that maximizes light absorption while maintaining display quality.
Implementation Method 1
a light gathering unit which is matched with the light absorption layer and used for gathering light incident on the light gathering unit from outside and irradiating the gathered light to the light absorption layer
Implementation Method 2
the light absorption layer is used for absorbing irradiation light
Data Source
AI summary
The present invention provides an organic light emitting diode display panel and a display device, and relates to the field of display technology, which can solve the problem that the display contrast of an existing organic light emitting diode display panel and an existing display device is reduced due to the reflection of ambient light. In the organic light emitting diode display panel and the display device of the present invention, a light gathering unit and a light absorption layer matched with each other are arranged in pixel defining regions, so that the incident ambient light can be gathered by the light gathering unit to the light absorption layer and absorbed by the light absorption layer, to reduce ambient light outgoing from the display panel due to reflection, and increase the contrast of the display panel.