Input Sensor Electrode Layout for Mixed-Size OLED Emitters
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Solution Overview
Problem
Existing display devices face challenges in integrating input sensors effectively with display panels, particularly in maintaining structural integrity and optimizing the arrangement of light emitting elements and input sensors to enhance user interaction.
Innovation Solution
A display device design that includes a display panel with varying thicknesses of organic and thin-film encapsulation layers overlapping light emitting elements, and an input sensor with specific electrode configurations to define opening areas, allowing for efficient integration and improved user input detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light emitting elements of different sizes are integrated on the display panel, then display flexibility and user interaction are enhanced, but manufacturing precision and structural uniformity become more difficult to maintain
Solution Approach 1:
The patent applies local quality by varying the thickness of the organic layer and thin-film encapsulation layer in different regions of the display panel. Specifically, the organic layer has a first thickness in a first area and a second thickness in a second area, and similarly for the encapsulation layer. This allows different regions to accommodate light emitting elements of different sizes while maintaining appropriate protective coverage and structural integrity in each local area.
Solution Approach 2:
The display panel structure is segmented into multiple areas with different layer thicknesses. The organic layer is divided into a first area with a first thickness and a second area with a second thickness, and the thin-film encapsulation layer is similarly segmented. This segmentation enables the panel to handle diverse light emitting element sizes while maintaining manufacturing precision through region-specific structural optimization.
2Measurement precision
If the organic layer and encapsulation layer thicknesses are varied to accommodate different light emitting element sizes, then detection capabilities are improved, but device complexity increases
Solution Approach 1:
The patent implements local quality by configuring the organic layer and thin-film encapsulation layer with different thicknesses in different areas corresponding to different light emitting element sizes. This allows optimized detection capabilities for each element type while maintaining a systematic approach to layer structure that manages device complexity through consistent patterning methods.
Data Source
AI summary
A display device includes a display panel which includes an organic layer, a light emitting element disposed on the organic layer, and a thin-film encapsulation layer which seals the light emitting element, and an input sensor disposed on the display panel. The input sensor includes a sensing electrode including a line element which defines an opening area corresponding to the light emitting element. The light emitting element includes a first light emitting element which provides a first light emitting area having a first surface area, and a second light emitting element which provides a second light emitting area having a second surface area that is greater than the first surface area. A first distance between the first light emitting element and the input sensor is less than a second distance between the second light emitting element and the input sensor in a thickness direction of the display device.