Cascaded Scan Driving Units for Frameless Display Resolution
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Solution Overview
Problem
Current display technologies face challenges in achieving a frameless design due to the occupation of non-display regions by gate driver on array (GOA) circuits, which increases row spacing between light-emitting units and reduces display resolution.
Innovation Solution
A driving substrate is designed with a base that includes a display region, multiple rows of scan lines, and data lines, along with a scan driving circuit arranged in the display region. The scan driving circuit consists of cascaded scan driving units, with each unit capable of outputting a gate scanning signal for at least one row, allowing for efficient use of space and reduced row spacing between light-emitting units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the GOA circuit is placed in the display region, then the frameless display design is achieved, but the row spacing between light-emitting units increases and resolution decreases
Solution Approach 1:
The scan driving circuit is segmented into multiple scan driving units arranged in different columns. Each scan driving unit independently drives scan lines for specific pixel rows, allowing the circuit to be distributed across the display region without concentrating all driving components in one location, thereby reducing the impact on row spacing.
Solution Approach 2:
The scan driving units are arranged not only in row direction but also in column direction, utilizing two-dimensional space distribution. This dimensional expansion allows the driving circuit to occupy horizontal space rather than vertically compressing the pixel rows, maintaining resolution while achieving frameless design.
2Ease of manufacture
If the GOA circuit occupies non-display regions on left and right sides, then the circuit can be placed, but the upper and lower sides cannot be frameless
Solution Approach 1:
The scan driving units are designed with multi-functional capability to drive multiple scan lines simultaneously. Each scan driving unit can output scan signals to multiple pixel rows, reducing the total number of driving units needed and allowing more flexible spatial arrangement that enables frameless design on all four sides.
Solution Approach 2:
By arranging scan driving units in both row and column directions across the display region, the circuit placement moves from edge-constrained (left/right sides only) to area-distributed (throughout display region), enabling frameless design on all sides including upper and lower edges.
3Area of stationary object
If the same scan driving unit is arranged in pixel regions in at least two rows, then the space is efficiently utilized and row spacing is reduced, but the device complexity increases
Solution Approach 1:
Multiple scan lines are merged into a single scan driving unit's output capability. The scan driving unit is designed to simultaneously drive multiple scan lines for different pixel rows, reducing the total number of driving units needed and optimizing space utilization while managing complexity through functional integration.
Solution Approach 2:
The scan driving unit is designed with universal functionality to operate across multiple pixel rows. By making each driving unit multi-functional rather than dedicated to a single row, the overall system complexity is reduced despite the increased versatility of individual units.
Data Source
AI summary
Disclosed are a driving substrate and a display panel. The driving substrate is configured to drive a light-emitting unit to emit light and includes a base including a display region, multiple rows of scan lines and multiple data lines arranged on the base, and a scan driving circuit. Multiple pixel regions are defined by the multiple rows of scan lines and the multiple data lines crossing each other longitudinally and horizontally. The pixel regions are located in the display region. Row directions of the multiple pixel regions are substantially parallel to the scan lines. The scan driving circuit is arranged in the display region of the base and includes multiple scan driving units which are cascaded. A same scan driving unit is arranged in pixel regions in at least two rows among the plurality of pixel regions and capable of outputting at least one row of gate scanning signal.