Display Device Circuit Overlap for Smaller Bezels and Larger Display Areas
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Solution Overview
Problem
The challenge is to reduce the size of the peripheral area in display devices while maintaining or increasing the display area, particularly as the demand for higher resolution and faster driving capabilities increases, leading to an expansion of the driving unit area.
Innovation Solution
The solution involves a display device design with a substrate that includes a first and second display area, where the second display area has a higher pixel density and incorporates a driving circuit unit that overlaps with the light-emitting elements, allowing for a reduced bezel and expanded image display region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the driving unit area is increased to implement high resolution and high speed driving, then the resolution and driving speed are improved, but the peripheral area becomes larger
Solution Approach 1:
The patent moves the driving circuit unit from the peripheral area to the display area, utilizing the vertical stacking dimension. The driving circuit unit is positioned to overlap with light-emitting elements in the display area, effectively using the third dimension (depth/stacking) to resolve the spatial conflict between display area and driving circuit area.
Solution Approach 2:
The patent merges the driving circuit unit with the display area by positioning them to overlap. The driving circuit unit is integrated into the display area structure, sharing the same physical space with light-emitting elements through vertical stacking, thereby eliminating the need for separate peripheral area.
2Speed
If the driving unit area is increased to implement high speed driving, then the driving speed is improved, but the peripheral area becomes larger
Solution Approach 1:
The patent utilizes vertical stacking to position the driving circuit unit overlapping with light-emitting elements in the display area. This dimensional transition allows high-speed driving circuitry to be integrated without expanding the peripheral area, as the driving unit occupies the same planar footprint but different vertical layer.
3Area of moving object
If the display area is expanded, then the image display region is enlarged, but the dead space within the image display region increases
Solution Approach 1:
The patent merges the driving circuit unit function with the display area by positioning them to overlap. The driving circuit unit is integrated into the display area structure, sharing the same physical space with light-emitting elements through vertical stacking, thereby eliminating the need for separate peripheral area.
Data Source
AI summary
A display device includes: a substrate including a first display area and a second display area; a plurality of first pixel circuit units positioned on the first display area; a plurality of first light-emitting elements respectively connected to the plurality of first pixel circuit unit; a plurality of second pixel circuit units positioned on the second display area; a plurality of second light-emitting elements respectively connected to the plurality of second pixel circuit units; and a driving circuit unit connected to the plurality of first pixel circuit units and the plurality of second pixel circuit units and overlapping the plurality of second light-emitting elements, wherein a number of the plurality of first pixel circuit units per unit area is larger than a number of the plurality of second pixel circuit units per unit area.