Display Device with Crossed Conductive Lines for High Transmittance
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Solution Overview
Problem
Display devices face a challenge in maintaining high resolution while also achieving high transmittance for functions like light or sound, as increasing transmittance often compromises resolution.
Innovation Solution
A display device design that includes a substrate with an organic insulating layer, multiple display elements, and conductive lines that cross each other, along with thin-film transistors and semiconductor layers, allows for high transmittance while maintaining resolution through a simplified manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high transmittance is maintained in the area for performing various functions, then light transmittance is improved, but the resolution of the area decreases
Solution Approach 1:
The display device is divided into a first area for high-resolution display and a second area for functions requiring high transmittance. This spatial segmentation allows each area to be optimized independently, with the first area using more complex pixel circuits for high resolution and the second area using simplified structures for maximum light transmission.
Solution Approach 2:
Different areas of the display device are assigned different functional qualities. The first area maintains high resolution with complete pixel circuits, while the second area uses a simplified structure with shared pixel circuits to achieve high transmittance. This local differentiation resolves the contradiction by allowing each region to have the properties needed for its specific function.
2Adaptability or versatility
If various functions are added to display devices, then functionality is improved, but the area occupied by image-displaying may be reduced or resolution compromised
Solution Approach 1:
The display device incorporates multiple functions by adding a sensor unit that can detect light, touch, or other physical quantities. The second area is designed to support both display functions and sensing functions simultaneously, allowing the device to perform multiple operations without compromising the primary display resolution in the first area.
Solution Approach 2:
The patent adds functional capabilities in a different dimensional space by introducing a sensor unit that operates alongside the display elements. Instead of competing for the same physical space, the sensing functions are integrated in a way that allows coexistence, with the sensor unit detecting various physical quantities while the display areas maintain their visual output functions.
3Manufacturing precision
If more pixel circuits are added to achieve high resolution, then resolution is improved, but device complexity increases
Solution Approach 1:
Adjacent pixel circuits are merged into a shared circuit structure in the second area. Instead of providing separate pixel circuits for each display element in the high-transmittance area, the patent combines multiple pixel circuits into a shared unit that controls multiple display elements, thereby reducing the total number of circuits while maintaining display functionality.
Solution Approach 2:
The patent applies partial pixel circuit functionality in the second area, where not all pixel circuits are fully implemented. Instead of providing complete pixel circuits for every display element in the second area, only necessary circuit components are included, reducing overall device complexity while still achieving the required display resolution in the first area.
Data Source
AI summary
A display device includes: a substrate; an inorganic insulating layer arranged on the substrate; a plurality of display elements arranged on the organic insulating layer and including a plurality of first display elements and a plurality of second display elements; a lower line arranged between the substrate and the organic insulating layer, and electrically connecting one of the plurality of first display elements and another one of the plurality of first display elements to each other; and an upper line arranged on the organic insulating layer, and electrically connecting one of the plurality of second display elements and the other one of the plurality of second display elements to each other.