Active-Area Gate Driver Layout for Narrow-Bezel Displays
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Solution Overview
Problem
Existing display technologies face challenges in minimizing the size of the inactive border region due to the large footprint of gate driver circuitry, which increases the overall size of the display and affects the active display area.
Innovation Solution
The gate driver circuitry is partially positioned within the active area of the display by creating a low pixel-density region along an edge, allowing for the accommodation of additional components such as gate driver circuitry or data lines, and a smoothing region is used to gradually transition the pixel density, ensuring minimal visibility of the low pixel-density area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If gate driver circuitry is positioned in the inactive border region, then the display structure is simple and easy to manufacture, but the inactive border region size increases
Solution Approach 1:
The gate driver circuitry is moved from the traditional inactive border region into the active display area, utilizing the vertical space above the pixel array. This dimensional repositioning allows the driver circuitry to occupy space that was previously unused, thereby reducing the inactive border region size without significantly increasing manufacturing complexity.
Solution Approach 2:
The display structure is designed with a flexible active area that can dynamically adjust its boundaries. The active area extends to include the region where gate driver circuitry is positioned, allowing the display to maintain its functional integrity while minimizing the inactive border region.
2Area of stationary object
If gate driver circuitry is positioned in the active area, then the inactive border region size decreases, but the pixel density uniformity deteriorates
Solution Approach 1:
The active area is segmented into two distinct regions: a first active area with normal pixel density for high-quality display, and a second active area with reduced pixel density for accommodating gate driver circuitry. This segmentation allows each region to serve its specific function while maintaining overall system performance.
Solution Approach 2:
Different pixel density characteristics are applied to different regions of the active area. The first active area maintains normal pixel density for optimal image quality, while the second active area has reduced pixel density to provide space for gate driver circuitry. This local differentiation resolves the conflict between minimizing border region size and maintaining pixel density uniformity.
3Volume of stationary object
If pixel density is reduced in the low pixel-density region, then space for gate driver circuitry increases, but the image quality in that region deteriorates
Solution Approach 1:
The display system uses a first pixel array in the normal density region to generate the primary image, and a second pixel array in the reduced density region to generate a complementary image. These two images are combined to form the final displayed image, allowing the reduced density region to provide necessary space for gate driver circuitry while maintaining overall image quality through the collaborative contribution of both regions.
Data Source
AI summary
To reduce the amount of space occupied in the inactive area of a display by gate driver circuitry, at least a portion of the gate driver circuitry may be positioned in the active area of the display. To accommodate the gate driver circuitry, emissive sub-pixels may be laterally shifted relative to corresponding thin-film transistor sub-pixels. This allows for the thin-film transistor sub-pixels to be grouped adjacent to the central area of the active area, leaving room along an edge of the active area to accommodate one or more additional display components such as gate driver circuitry or fanout portions of data lines.