Display Panel Shielding Structure for Photosensitive-Area Transmittance
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Solution Overview
Problem
Existing display panels face challenges in achieving high light transmittance in photosensitive areas, which is crucial for full-screen display and under-screen photosensitivity, with current methods resulting in low transmittance below 18% and inadequate user experience.
Innovation Solution
A display panel design with a first display area and an adjacent second display area, featuring a first shielding layer with specific shielding sub-parts and a light-emitting layer with uniform pixel density, allowing for laser patterning of metal electrodes from the backside to enhance light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If holes are dug for the photosensitive area to increase light transmittance, then the transmittance of the panel is improved, but the area does not emit light and cannot present a full-screen effect
Solution Approach 1:
The display panel is divided into two distinct display areas: a first display area with light-emitting pixels for normal display, and a second display area without light-emitting pixels for photosensitive functions. This segmentation allows each area to be optimized independently, enabling high light transmittance in the photosensitive area while maintaining full-screen display capability in the first area.
Solution Approach 2:
Different structural configurations are applied to different areas of the panel. The first display area maintains complete light-emitting pixel structures for display, while the second display area removes light-emitting pixels to maximize light transmittance for photosensitive element operation, with each area having locally optimized properties.
2Area of stationary object
If pixel density of the photosensitive area is reduced to increase transmittance, then full-screen display is achieved to a certain extent, but the transmittance of the photosensitive area is still less than 18%
Solution Approach 1:
Light-emitting pixels are completely extracted (removed) from the second display area designated for photosensitive functions. This extraction eliminates the obstruction caused by light-emitting pixel structures, allowing light to pass through the photosensitive area with minimal interference, thereby achieving transmittance well above 18%.
3Manufacturing precision
If a shielding layer is added to enable laser patterning of metal electrodes, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
A shielding layer is introduced in the metal electrode layer before laser patterning of the organic light-emitting layer. This preliminary shielding structure prevents laser damage to underlying layers during the patterning process, enabling precise laser processing while protecting the integrity of the device structure.
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
Improves light transmittance in photosensitive areas, enabling efficient operation of photosensitive elements and maintaining display functionality, thereby enhancing the full-screen display experience.
Implementation Method 1
a first shielding layer corresponding to the first display area... the first shielding layer is employed to shield a part of the light-emitting layer, so that the metal electrode in the light-emitting layer can be patterned by a laser patterning process from the back side
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a substrate layer and a light-emitting layer. The substrate layer includes a first shielding layer corresponding to a first display area. The light-emitting layer comprises first light-emitting pixels arranged in the first display area and second light-emitting pixels arranged in a second display area. The first shielding layer includes: a first shielding sub-part corresponding to the first light-emitting pixel and a second shielding sub-part connecting two adjacent first shielding sub-parts.