Display Panel Pad Feedback for Corrosion Reduction
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Solution Overview
Problem
Corrosion phenomena occur in pads of display devices due to potential differences between adjacent pads, leading to increased resistance, disconnections, and short circuits, which deteriorate the reliability of the display device.
Innovation Solution
A display device with a display panel and detection pads that sense both first and second driving signals, generating an individual signal by analyzing their waveforms, which is applied to an individual pad to manage potential differences and reduce corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple output pads are electrically connected to the display panel to provide driving signals, then the display device can transfer multiple driving signals efficiently, but potential differences between adjacent pads cause corrosion phenomena
Solution Approach 1:
An individual pad is introduced as an intermediary element disposed between adjacent output pads. This individual pad acts as a mediator that receives individual signals from the driving circuit and provides them to the display panel, thereby preventing direct potential difference interactions between adjacent output pads that would cause corrosion. The individual pad isolates the electrical stress between neighboring signal-carrying pads while maintaining efficient signal transfer capability.
Solution Approach 2:
Detection pads are configured to sense the driving signals transmitted through output pads and feed back information to the driving circuit. The driving circuit analyzes the sensed signals and generates individual signals accordingly, creating a feedback loop that enables dynamic adjustment and monitoring of pad potentials, thereby preventing corrosion by maintaining optimal electrical conditions.
2Reliability
If detection pads are added to sense driving signals for generating individual signals, then pad corrosion is reduced, but device complexity increases
Solution Approach 1:
The detection pads serve multiple functions: they sense the driving signals for corrosion prevention, provide feedback information for individual signal generation, and can potentially monitor display panel performance. By making the detection pads multi-functional, the patent reduces the need for separate dedicated components, thereby limiting the increase in device complexity while achieving improved reliability through corrosion resistance.
Data Source
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AI summary
A display device (100) includes a display panel (DP) including signal lines (SL) connected to at least one pixel, at least one first output pad (PD1) that transfers a first driving signal (SCS1) supplied to the signal lines, at least one second output pad (PD2) that transfers a second driving signal (SCS2) supplied to the signal lines, detection pads (DPD) that sense each of the first driving signal (SCS1) and the second driving signal (SCS2), an individual pad (OPD) disposed adjacent to the first output pad and the second output pad, and a driving circuit (DIC) that generates an individual signal (OS) by analyzing a waveform of each of the first driving signal (SCS1) and the second driving signal (SCS2).