Common Wiring Layout for Crosstalk-Suppressed Display Panels
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Solution Overview
Problem
Existing display devices face challenges in reducing crosstalk due to difficulties in providing common bus lines and switch groups, leading to unstable common electrode potentials and display defects.
Innovation Solution
A display device design with a first substrate having a display area and a non-display area, featuring signal supply units and common wiring lines arranged to maintain stable common potential by shortening wiring lengths and reducing resistance, using a combination of first and second metal films for wiring structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If common bus lines are provided adjacent to source bus lines in the display area, then crosstalk can be reduced, but it becomes difficult to provide the common bus lines in some display devices
Solution Approach 1:
The patent moves the common wiring lines from the display area to the non-display area, changing the spatial dimension where these critical components are located. This allows the common electrode to be properly connected without the manufacturing constraints that would exist if common bus lines were placed in the display area, while still achieving crosstalk suppression through proper potential control.
Solution Approach 2:
The patent introduces signal supply units as intermediary components that actively control and stabilize the potential of common wiring lines. These signal supply units act as mediators between the common electrode and the display area, ensuring stable potential distribution without requiring physical proximity of common bus lines to source bus lines in the display area.
2Object-affected harmful factors
If a switch group is provided to control row electrodes for floating after polarity inversion, then crosstalk occurrence is reduced, but it becomes difficult to provide such switch group in some display devices
Solution Approach 1:
The patent extracts the crosstalk control function from the row electrode switching mechanism and implements it separately through signal supply units that control common wiring lines. This separates the potential control function from the pixel switching function, eliminating the need for complex switch groups while still achieving crosstalk suppression through stable common potential maintenance.
Solution Approach 2:
The signal supply units serve as intermediary components that provide active potential control to common wiring lines. Instead of using switch groups to control row electrodes, the patent uses these intermediary signal supply units to stabilize the common potential, thereby reducing crosstalk through a different control mechanism that doesn't require additional switching components.
3Reliability
If common wiring lines are extended across the display area, then the common electrode can be connected, but parasitic capacitance increases and potential becomes unstable
Solution Approach 1:
The patent extracts the common wiring lines from the display area and relocates them to the non-display area. This separation removes the parasitic capacitance problems that would arise from extended wiring across the display area, while still achieving proper connection to the common electrode through contact holes, thereby stabilizing the common potential.
Solution Approach 2:
The patent introduces signal supply units as intermediary components that actively stabilize the potential of common wiring lines. These signal supply units compensate for any remaining potential fluctuations and parasitic effects, ensuring stable common electrode potential even with the modified wiring configuration.
Data Source
AI summary
A display device includes a first substrate having a main surface having a display area in which an image is to be displayed and a non-display area in which the image is not to be displayed, at least one first wiring line disposed in the display area of the first substrate and extending in a first direction, a signal supply unit disposed in a first end portion in the non-display area of the first substrate in the first direction, and connected at least to the at least one first wiring line, the signal supply unit being configured to supply a signal to the at least one first wiring line, a common electrode disposed in the display area of the first substrate, and at least one common wiring line disposed in the non-display area of the first substrate and connected to the common electrode.