Transparent OLED Panel Reflector Layout for Uniform Brightness
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Solution Overview
Problem
Conventional OLED display panels experience significant differences in metal density and reflectivity between pixel driving islands and normal display areas, leading to non-uniformity in display brightness due to the concentration of driving circuits in the transition display area.
Innovation Solution
Incorporating a reflector in the same layer as the sources and drains of both first and second pixel driving circuits, with strategically placed reflection portions in the main and transition display areas to adjust the reflectivity and metal density, ensuring uniform brightness across the display panel by optimizing the percentage of unit areas of reflection portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If driving circuits for pixels in the transparent display area and transition display area are gathered to form pixel driving islands, then the transparent display area achieves high transmittance, but there is a significant difference in metal density arrangements between the pixel driving islands and the normal display area, causing significant difference in reflectivity
Solution Approach 1:
The patent applies local quality by introducing reflectors with different densities in different regions: first reflectors in the normal display area and second reflectors in the transition display area. Each region's reflector density is specifically optimized to compensate for the local metal density differences caused by the pixel driving island configuration, thereby achieving uniform overall reflectivity while maintaining high transmittance in the transparent display area.
2Illumination intensity
If driving circuits are concentrated in the transition display area, then the transparent display area can achieve high transmittance, but the significant difference in metal density causes non-uniformity in display brightness
Solution Approach 1:
The patent changes the parameter of reflector density distribution to compensate for metal density variations. By adjusting the density of reflectors in different regions (higher density in transition area, lower density in normal area), the overall optical properties are balanced, achieving uniform brightness despite the non-uniform metal distribution caused by concentrated driving circuits.
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 solution reduces the brightness difference between the transition and main display areas to less than 0.5%, achieving uniform display brightness and eliminating obvious demarcations, thereby enhancing display uniformity.
Implementation Method 1
a reflector disposed in a same layer as the sources and the drains of the first pixel driving circuits and the sources and the drains of the second pixel driving circuits, and including a plurality of first reflection portions located on the driving circuit islands and a plurality of second reflection portions located in the main display area
Data Source
AI summary
A display panel and a display device are provided. The display panel is provided with a plurality of first pixels and a plurality of first pixel driving circuits located in a main display area, a plurality of second pixels located in a transparent display area and a transition display area, a plurality of second pixel driving circuits located in the transition display area, and a reflector. The second pixel driving circuits form a plurality of driving circuit islands for driving the second pixels. The reflector is disposed in a same layer as the sources and the drains of the first pixel driving circuits and the sources and the drains of the second pixel driving circuits. The reflector includes a first reflection portion located on the driving circuit islands.