Transparent Display Device with Segmented Transmissive and Pixel Areas
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Solution Overview
Problem
Current display devices lack the ability to effectively allow viewing of a background or object on the rear surface while maintaining transparency and functionality, particularly in applications requiring spatial and visual integration like smart windows.
Innovation Solution
A display device design featuring a wiring area with scan lines and data lines, transmissive areas that transmit light, pixel drivers, pad electrodes, supplement electrodes, and light emitting elements, allowing for transparent display and touch sensing without separate touch panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If transmission areas are added to allow viewing of the rear surface, then transparency is improved, but the display area and pixel density are reduced
Solution Approach 1:
The display panel is segmented into multiple types of areas: first transmission areas for transparency, second transmission areas for touch sensing, and pixel areas for display. This segmentation allows each area to perform its specific function optimally without compromising the others.
Solution Approach 2:
Different areas of the display panel are assigned different properties: transmission areas have high light transmittance for transparency, pixel areas have light emitting elements for display, and touch sensing areas have conductive patterns for touch detection. This local differentiation resolves the contradiction by allowing transparency and display area to coexist in their respective zones.
2Device complexity
If pad electrodes are positioned over pixel drivers, then wiring complexity is reduced, but touch sensing capability is compromised
Solution Approach 1:
The display panel is divided into distinct functional zones: pixel drivers are positioned in wiring areas, while pad electrodes are positioned in transmission areas. This spatial segmentation allows pad electrodes to maintain touch sensing capability while pixel drivers handle driving functions without interference.
Solution Approach 2:
The display medium serves as an intermediary that electrically connects pad electrodes to pixel drivers through the light emitting element. This allows current to flow from the pad electrode through the light emitting element to the pixel driver, enabling touch sensing without direct physical contact between pad electrodes and pixel drivers.
3Adaptability or versatility
If a separate touch panel is added for touch sensing, then touch capability is improved, but device complexity and layer structure are increased
Solution Approach 1:
The display panel and touch sensing functions are merged into a single integrated structure. The display medium itself serves as both the display element and the touch sensing element, eliminating the need for a separate touch panel layer.
Solution Approach 2:
The display medium performs multiple functions: it emits light for display, transmits light for transparency, and detects touch through its conductive properties. This multi-functionality eliminates the need for separate components and reduces overall device complexity.
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
Enables clear viewing of the background or object on the rear surface through transparent areas when not displaying images, while supporting touch functionality and maintaining the display's transparency and spatial integration capabilities.
Implementation Method 1
a transmissive area surrounded by the wiring area and configured to transmit light
Implementation Method 2
a light emitting element on the first pad electrode and the second pad electrode
Data Source
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AI summary
A display device including a wiring area including a plurality of scan lines extending in a first direction and a plurality of data lines extending in a second direction crossing the first direction, a transmissive area surrounded by the wiring area and configured to transmit light, a plurality of pixel drivers respectively connected to one of the plurality scan lines and one of the plurality of data lines, a first pad electrode and a second pad electrode overlapping a first pixel driver from among the plurality of pixel drivers, a light emitting element on the first pad electrode and the second pad electrode, a first supplement electrode overlapping the first pad electrode, and a second supplement electrode overlapping the second pad electrode.