Pixel Driver Layout With Shared Lines for Higher-Resolution Displays
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Solution Overview
Problem
Existing display devices face limitations in increasing resolution due to the wide width of light-emitting pixel drivers, particularly when the channel portion of the first transistor exceeds a critical value, leading to constraints in integrating more pixel drivers.
Innovation Solution
The display device incorporates symmetrical semiconductor layers and sharing lines to reduce the number of sharing lines, allowing for a more compact arrangement of light-emitting pixel drivers, thereby increasing the resolution without expanding the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the channel portion of the first transistor is increased beyond a critical value to secure current characteristics, then the current characteristics are improved, but the width of the light-emitting pixel driver increases
Solution Approach 1:
The patent combines two semiconductor layers (first and second semiconductor layers) into a single integrated structure that serves both pixel drivers. This merging allows the pixel drivers to share common structural elements, reducing the overall width required while maintaining the necessary current characteristics through optimized channel portions.
Solution Approach 2:
The first and second semiconductor layers are designed to perform multiple functions simultaneously - each layer serves its respective pixel driver while also contributing to the overall structural efficiency. The symmetrical arrangement allows both layers to be part of a unified system that optimizes space utilization and reduces the width of individual pixel drivers.
2Reliability
If the width of light-emitting pixel drivers is increased to secure current characteristics, then the current characteristics are improved, but the resolution of the display device cannot be increased
Solution Approach 1:
By merging the semiconductor structures of adjacent pixel drivers into a shared first and second semiconductor layers, the patent reduces the width each pixel driver occupies. This increased integration density allows more pixel drivers to be arranged in the same display area, thereby improving resolution while maintaining adequate current characteristics through the optimized shared structure.
Solution Approach 2:
The patent transitions from a single-layer semiconductor structure to a multi-layer structure (first and second semiconductor layers arranged symmetrically). This dimensional change allows vertical stacking and sharing of structural elements, effectively reducing the horizontal width requirement and enabling higher pixel density without compromising current characteristics.
3Length of stationary object
If the number of sharing lines is reduced through symmetrical semiconductor layers, then the width required for sharing lines is reduced, but the complexity of the circuit layer increases
Solution Approach 1:
The patent employs a symmetrical arrangement of the first and second semiconductor layers, which creates a balanced and regularized circuit structure. This symmetry, rather than increasing complexity, provides a predictable pattern that simplifies manufacturing and design while reducing the number of sharing lines needed, as adjacent pixel drivers can mirror each other's configuration.
Solution Approach 2:
The circuit layer is segmented into distinct first and second semiconductor layers with clearly defined symmetrical relationships. This segmentation allows each layer to be independently optimized and manufactured, reducing the overall width required for sharing lines while maintaining manageable complexity through modular design principles.
Data Source
AI summary
A display device includes a circuit layer including light-emitting pixel drivers; a first sharing line next to a first boundary between a first light-emitting pixel driver and a second light-emitting pixel driver next to each other, and electrically connected to the first light-emitting pixel driver and the second light-emitting pixel driver; a first semiconductor layer on a substrate; and a second semiconductor layer on a first inter-insulating layer. Each of the light-emitting pixel drivers includes a first transistor of which a channel portion, a first electrode, and a second electrode are disposed in the second semiconductor layer. A first semiconductor layer and a second semiconductor layer of the first light-emitting pixel driver are symmetrical with a first semiconductor layer and a second semiconductor layer of the second light-emitting pixel driver with respect to the first boundary.