Matrix-Wired Display Panel With Integrated Touch and Defect Tolerance
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Solution Overview
Problem
Existing display devices with light emitting diodes face issues such as image defects due to defects or omissions in light emitting devices, require separate touch sensor structures, and have numerous external driving components, complicating manufacturing and assembly.
Innovation Solution
A display device with a matrix-form wiring structure using common electrodes for both display and touch sensing, and shared column and row lines to drive multiple light emitting devices, allowing for defect compensation and reduced external drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate dedicated touch sensor structure is added, then touch sensing capability is improved, but device complexity increases
Solution Approach 1:
The row lines are designed to serve dual purposes: as common electrodes for driving light emitting devices during display operation and as touch sensor electrodes for detecting touch input. This multi-functionality eliminates the need for separate dedicated touch sensor structures, thereby improving adaptability while avoiding increased device complexity
Solution Approach 2:
The patent merges the touch sensor structure with the display electrode structure by using the same row lines for both display and touch sensing functions. This consolidation combines two previously separate functions into a single integrated structure, reducing overall device complexity while maintaining both display and touch capabilities
2Adaptability or versatility
If multiple external driving components are used, then driving capability is improved, but device complexity increases
Solution Approach 1:
The column lines and row lines are designed as universal driving lines that can drive multiple light emitting devices through matrix scanning. This multi-functional wiring structure replaces the need for multiple separate external driving components, maintaining driving capability while reducing the number of external drivers required
Solution Approach 2:
The patent segments the driving function into two sets of lines (column lines and row lines) that work together through matrix scanning to control multiple light emitting devices. This segmentation allows a small number of external drivers to control a large number of devices by time-division multiplexing, reducing external component count while maintaining full driving capability
3Manufacturing precision
If light emitting devices are arranged in a matrix pattern, then manufacturing precision is improved, but reliability decreases due to defect propagation
Solution Approach 1:
The patent extracts the defective light emitting device from the functional circuit by using the matrix wiring structure to isolate it. When a device is defective or omitted, the corresponding row and column lines can be controlled to prevent defect propagation to adjacent devices, effectively removing the defect from affecting overall system reliability
Solution Approach 2:
The matrix wiring structure acts as an intermediary that provides electrical isolation between adjacent light emitting devices. Through controlled activation of specific row and column lines, the wiring structure can prevent defects in one device from propagating to neighboring devices, thereby maintaining system reliability despite manufacturing variations
Data Source
AI summary
A display device may include a substrate including a display area, a plurality of light emitting devices in the display area, a plurality of column lines in the display area and extending in a column direction, a plurality of row lines in the display area and extending in a row direction, and a plurality of drivers on the substrate and positioned in the display area, and configured to drive the column lines and the row lines. Each of the plurality of column lines may be electrically connected with a first electrode of each of two or more light emitting devices arranged in the same column among the plurality of light emitting devices. Each of the plurality of row lines may be electrically connected with a second electrode of each of two or more light emitting devices arranged in the same row among the plurality of light emitting devices.