Transparent Display Sub-Pixel Layout for Higher Transmittance
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Solution Overview
Problem
Conventional transparent display panels have poor transparency, which hinders their commercialization due to reduced light transmittance and luminous efficiency when attempting to minimize the light-emitting area.
Innovation Solution
The display panel is designed with sub-pixel units divided into light-emitting and light-transmitting areas, where the quantity of transparent film layers in the light-transmitting area is minimized by confining them to the light-emitting area, thereby enhancing transmittance without affecting luminous efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light-emitting area is minimized to improve transparency, then the transparency is improved, but the luminous efficiency deteriorates
Solution Approach 1:
The sub-pixel unit is divided into two distinct regions: a light-emitting area containing transparent film layers for light generation, and a light-transmitting area with reduced or no transparent film layers for light transmission. This spatial segmentation allows the panel to simultaneously achieve transparency in the light-transmitting area and maintain luminous efficiency through the light-emitting area, resolving the contradiction between these two opposing requirements.
Solution Approach 2:
Different regions of the sub-pixel unit are assigned different optical properties: the light-emitting area has higher optical density with multiple transparent film layers to ensure sufficient light emission, while the light-transmitting area has lower optical density with minimized film layers to maximize light transmission. This local differentiation of quality allows the panel to optimize both transparency and luminous efficiency in their respective zones.
2Illumination intensity
If transparent film layers are reduced to improve transparency, then the transparency is improved, but the luminous efficiency deteriorates
Solution Approach 1:
The panel structure is segmented into light-emitting areas with complete transparent film layer stacks and light-transmitting areas with reduced film layers. This segmentation enables the light-transmitting area to achieve high transparency while the light-emitting area maintains full luminous efficiency, as each region is optimized for its specific function without compromising the other.
Solution Approach 2:
The quantity of transparent film layers is locally adjusted: full stacks of transparent film layers (buffer layer, interlayer insulating layer, protective layer, planarization layer, pixel defining layer, light-emitting layer) are retained in the light-emitting area to ensure luminous efficiency, while these layers are minimized or removed in the light-transmitting area to maximize light transmittance, thereby resolving the contradiction between these two parameters.
Data Source
AI summary
The present disclosure provides a display panel, a display device, and a method for manufacturing a display panel. The display panel includes a pixel unit. The pixel unit includes a plurality of sub-pixel units. Each of the plurality of sub-pixel units includes at least one transparent film layer. Each of the plurality of sub-pixel units is divided into a light-emitting area and a light-transmitting area, and the quantity of the transparent film layer in the light-transmitting area is smaller than the quantity of the transparent film layer in the light-emitting area.