Transparent Display Device Non-Overlapping Transistor Capacitor Layout
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Solution Overview
Problem
Transparent display devices face challenges with reduced light emission areas due to the presence of transmissive areas and the overlap of circuit elements, which can lead to short circuits and decreased efficiency.
Innovation Solution
A transparent display device design that separates the driving transistor and capacitor to prevent short circuits, with a non-overlapping configuration and additional electrodes for stable contact, increasing the light emission area in non-transmissive regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If circuit elements are overlapped in the non-transmissive area to save space, then the light emission area is increased, but short circuits occur between overlapped circuit elements
Solution Approach 1:
The non-transmissive area is divided into separate regions: one for the driving transistor and another for the capacitor, with insulating films strategically placed between them. This segmentation prevents short circuits while maintaining compact layout and maximizing light emission area.
Solution Approach 2:
Insulating films are introduced as intermediary layers between the driving transistor and capacitor electrodes. These intermediary insulating films prevent direct contact between conductive elements, eliminating short circuit risks while allowing close proximity placement for space efficiency.
2Illumination intensity
If the non-transmissive area is reduced to increase transmissive area, then transparency is improved, but circuit elements have insufficient space and must be overlapped
Solution Approach 1:
The layout transitions from two-dimensional overlapping to three-dimensional layering with multiple insulating film layers. This vertical dimensionality allows circuit elements to be placed in close proximity without overlapping, reducing the non-transmissive area while preventing short circuits through layered insulation.
3Area of stationary object
If circuit elements are placed in a narrow non-transmissive area, then space is saved, but manufacturing precision requirements increase to prevent short circuits
Solution Approach 1:
Insulating films are placed beforehand between circuit elements before final assembly. These pre-positioned insulating films act as cushioning barriers that prevent short circuits even when manufacturing alignment varies within tolerance ranges, reducing the need for extreme precision.
Data Source
AI summary
A transparent display device is disclosed, which may prevent a short circuit from occurring between first and second capacitor electrodes of a capacitor. The transparent display device includes a substrate provided with a display area including a transmissive area and a non-transmissive area, in which a plurality of subpixels are disposed, and a non-display area adjacent to the display area, a driving transistor provided in the non-transmissive area over the substrate, including an active layer, a gate electrode, a source electrode and a drain electrode, and a capacitor provided in the non-transmissive area over the substrate, including a first capacitor electrode and a second capacitor electrode. The second capacitor electrode is not overlapped with the active layer of the driving transistor.