Display Panel Power-Bus Overlap for Narrow-Bezel Layout
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Solution Overview
Problem
The existing display panels face challenges in reducing bezel width due to the large space occupied by peripheral driver circuits, which provide drive signals for pixel units.
Innovation Solution
The display panel design incorporates a driver circuit that provides drive signals for pixel circuits, with a second power signal bus overlapping the driver circuit to reduce bezel width, and utilizes unilateral or bilateral driving methods to minimize bezel area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver circuit is disposed in the bezel region to provide drive signals for pixel units, then the display panel can achieve proper driving function, but the bezel width increases due to the large space occupied by the driver circuit
Solution Approach 1:
The patent transitions the driver circuit from a planar 2D layout to a 3D stacked architecture. The first and second driver circuits are disposed at different vertical levels (different dimensions) within the bezel region, allowing them to share the same footprint area while maintaining functional independence. This vertical stacking approach effectively utilizes the third dimension (height/depth) to reduce the horizontal space occupation, thereby decreasing bezel width while preserving driving functionality.
Solution Approach 2:
The patent implements a nested configuration where the second driver circuit is positioned to overlap with the first driver circuit in the vertical direction. The power signal buses are also nested by having them overlap the driver circuits, allowing multiple functional elements to occupy the same spatial region at different vertical levels. This nesting strategy maximizes space utilization within the bezel region, enabling compact integration of driving functions with reduced bezel dimensions.
2Productivity
If the driver circuit occupies large space in the bezel region, then it can provide sufficient drive signals, but it becomes difficult to further reduce the bezel width
Solution Approach 1:
The patent resolves the space-constraint problem by moving the driver circuit architecture into the vertical dimension. Multiple driver circuits are stacked at different height levels within the same horizontal footprint, transforming a 2D space occupation problem into a 3D vertical arrangement. This allows sufficient driving capability to be achieved without proportionally increasing the bezel area, as the additional driver circuits occupy vertical space rather than horizontal space.
Solution Approach 2:
The patent merges multiple driver circuits and power signal buses into a compact stacked configuration within the bezel region. By combining these functional elements in a vertical stack rather than spreading them out horizontally, the design achieves comprehensive driving functionality while minimizing the overall bezel area occupied by these components.
Data Source
AI summary
Provided are a display panel and a display device. The display panel includes a driver circuit, a pixel circuit, a light-emitting element, a first power signal bus, and a second power signal bus. The driver circuit provides a drive signal for the pixel circuit. The pixel circuit provides a drive current for the light-emitting element. The light-emitting element includes a first electrode and a second electrode. The first power signal bus transmits a first power signal V1, the second power signal bus transmits a second power signal V2, and V1≠V2. The first power signal bus is connected to the pixel circuit. The pixel circuit is connected to the first electrode. The second power signal bus is connected to the second electrode. The second power signal bus at least partially overlaps the driver circuit.