Timing Controller Output Pad Grouping to Reduce Corrosion

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Solution Overview

Problem

Corrosion of pads in timing controllers due to large voltage differences between adjacent pads, leading to reliability issues such as resistance increase, disconnection, and short circuits.

Innovation Solution

Grouping output pads into sub-pad groups with electrical connections and arranging them in specific directions to alleviate voltage differences, using transmission lines that overlap partially to distribute signals effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If output pads are arranged close to each other to reduce space, then device compactness is improved, but voltage difference between adjacent pads increases causing corrosion

Engineering Contradiction:

Improvepad arrangement areaVSAvoidpad corrosion resistance

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The output pads are divided into multiple sub-pad groups (first sub-pad group, second sub-pad group, etc.), where each sub-pad group contains multiple pads that are electrically connected. This segmentation allows pads to be arranged in a compact manner while maintaining electrical connectivity within groups, reducing the voltage difference impact between adjacent pads.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the pad arrangement are given different characteristics: pads within the same sub-pad group are electrically connected (same voltage potential), while pads in different sub-pad groups may have different voltages. This local differentiation reduces the harmful voltage differences between adjacent pads by ensuring adjacent pads in the same group share the same voltage.

Inventive Principle:

Principle #3Local quality

2Reliability

If multiple output pads are electrically connected to reduce voltage differences, then corrosion resistance is improved, but pad structure complexity increases

Engineering Contradiction:

Improvecorrosion resistanceVSAvoidpad grouping structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Multiple output pads that need to maintain the same voltage potential are merged into sub-pad groups by electrical connection. This merging reduces the number of independent voltage nodes and minimizes voltage differences between adjacent pads, thereby reducing corrosion while maintaining a relatively simple structure.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250292723A1Timing controller and display device including the same

Publication Date: 2025.09.18 SAMSUNG DISPLAY CO LTD

AI summary

A timing controller includes a control signal generator configured to generate a plurality of control signals, an output pad unit including a plurality of output pads for outputting the plurality of control signals to an outside of the timing controller, wherein the plurality of output pads are grouped into a plurality of sub pad groups and each of the plurality of sub pad groups includes P output pads, and wherein P represents a number of output pads in each of the plurality of sub pad groups and the P output pads are electrically connected with each other, and a plurality of transmission lines connecting the output pad unit to the control signal generator. The P output pads are adjacent to each other in a first direction, and the output pad unit is spaced apart from the control signal generator in a second direction crossing the first direction.