Display Device Brightness Uniformity Routed Wire Compensation
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Solution Overview
Problem
Conventional display devices have limitations in shape flexibility, leading to brightness unevenness in non-rectangular display regions.
Innovation Solution
A display device with a non-rectangular display region and a frame region, featuring data signal lines, scan signal lines, light-emission control lines, and sub-pixel circuits, along with routed wires and conductive films in specific metal layers, to improve signal distribution and reduce brightness unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a non-rectangular display region is implemented, then shape flexibility and adaptability are improved, but brightness unevenness occurs in the display region
Solution Approach 1:
The patent applies local quality by adding routed wires and conductive films specifically in the frame region adjacent to the non-rectangular display region. These additional conductive structures provide localized capacitance compensation only where needed at the cut corner areas, rather than uniformly across the entire display. This localized approach compensates for the reduced capacitance in peculiarly shaped regions, thereby improving brightness uniformity while maintaining shape flexibility.
Solution Approach 2:
The patent extends the wire routing into the frame region (an additional spatial dimension beyond the display region boundaries) to provide capacitance compensation. By routing wires through the frame region and adding conductive films in this extended area, the invention compensates for capacitance differences caused by non-rectangular shapes without affecting the display region geometry, thus resolving the brightness unevenness while maintaining shape adaptability.
2Reliability
If routed wires are extended into the frame region, then signal distribution and capacitance balance are improved, but device complexity increases
Solution Approach 1:
The routed wires in the frame region serve multiple functions: they provide capacitance compensation for the non-rectangular display region, maintain signal integrity, and balance the electrical characteristics across different display areas. By making these wires multi-functional, the patent achieves improved signal distribution uniformity without proportionally increasing device complexity, as the same structural elements perform multiple roles.
Solution Approach 2:
The frame region acts as an intermediary space that facilitates the routing of additional wires and conductive films. This intermediary zone allows for capacitance compensation structures to be implemented without directly complicating the display region layout. The frame region serves as a buffer zone where complex routing can be accommodated separately from the main display area, thereby improving signal distribution while isolating the complexity to a non-display area.
Data Source
AI summary
A frame region includes a first routed wire extending from one of a plurality of scan signal lines, one of a plurality of light-emission control lines, or one of a plurality of data signal lines. The first routed wire is electrically connected to drive circuits. The first routed wire is included in a first metal layer. A first conductive film is included in a second metal layer. The first routed wire and the first conductive film overlap each other via an inorganic insulating film.