Display Device Center Driving Circuit Layout
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Solution Overview
Problem
The increasing size and resolution of display devices lead to larger non-display regions due to the placement of scan drivers outside the display area, resulting in increased dead space and longer charging and discharging times for scan lines.
Innovation Solution
The display device incorporates a driving circuit at the center of the display region, allowing for non-overlapping pixel circuits and driving circuits at the same level, reducing the size of the non-display region and enabling independent driving of pixels with different clock signal frequencies for separate image regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the scan driver is disposed in the non-display region surrounding the display region, then the scan driver can be easily connected to the pixels, but the size of the non-display region increases and the dead space of the display device increases
Solution Approach 1:
The scan driver is moved from the peripheral non-display region into the central display region, changing its spatial dimension from outer to inner placement. This allows the scan lines to radiate outward from the center, reducing the peripheral dead space while maintaining connection functionality.
Solution Approach 2:
Instead of placing the scan driver at the periphery as conventionally done, the invention inverts the placement strategy by positioning it at the center of the display region. This inversion reduces the dead space around the borders while still enabling effective scanning across all pixels.
2Device complexity
If the scan driver is disposed in the non-display region, then the structure is simple, but the lengths of the scan lines increase and the charging and discharging time for the scan lines increases
Solution Approach 1:
By relocating the scan driver to the center and allowing scan lines to extend radially in multiple directions, the maximum line length is reduced compared to peripheral placement where lines must traverse the entire display area. This dimensional repositioning decreases RC time constants.
Solution Approach 2:
The scan driver is divided into multiple scanning units or channels that operate in parallel from the central position, allowing simultaneous charging of multiple scan line segments. This segmentation reduces the total time required to charge all scan lines across the display.
3Area of stationary object
If the driving circuit is disposed at the center portion of the display region, then the dead space is reduced, but the pixel circuits and driving circuit must be arranged at the same level without overlapping
Solution Approach 1:
The pixel circuits and scan driver are arranged in the same planar layer without vertical stacking or overlapping, using horizontal space efficiently. This same-level arrangement avoids the need for complex multi-layer interconnections while minimizing dead space through optimized lateral positioning.
Data Source
AI summary
A display device may include a plurality of pixels and a driving circuit. The plurality of pixels may respectively include a plurality of pixel circuits each having at least one transistor, and a plurality of display structures connected to the plurality of pixel circuits. The driving circuit may drive the plurality of pixels. The plurality of display structures may define a display region of the display device, and the driving circuit may be disposed at a center portion of the display region.