Cascaded Data Driver Chips on Display Panel Module

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Solution Overview

Problem

Conventional display panel architectures require lengthy printed circuit boards to connect multiple data driver chips, increasing manufacturing costs and reducing yield due to the need for extensive flexible connections.

Innovation Solution

The solution involves cascading data driver chips on a display panel and using multiple flexible printed circuit boards to transmit data and power signals, reducing the length and area of the printed circuit board and minimizing the number of connections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a single lengthy printed circuit board is used to connect all data driver chips, then all chips can be connected to the timing controller, but the printed circuit board area increases and manufacturing cost increases

Engineering Contradiction:

Improveconnection reliabilityVSAvoidprinted circuit board area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent divides the single lengthy printed circuit board into multiple separate flexible printed circuit boards (FPCs), each connecting to a group of cascaded data driver chips. This segmentation reduces the area of each individual FPC while maintaining all necessary connections through a modular arrangement.

Inventive Principle:

Principle #1Segmentation

2Reliability

If a single lengthy printed circuit board is used to connect all data driver chips, then all chips can be connected to the timing controller, but manufacturing cost increases

Engineering Contradiction:

Improveconnection reliabilityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent segments the connection system into multiple shorter FPCs that can be manufactured more efficiently and assembled in a modular fashion, reducing overall manufacturing cost while maintaining connection reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent utilizes the vertical dimension by stacking FPCs and utilizing cascaded connections, allowing multiple data driver chips to be connected without requiring a single lengthy horizontal board, thus reducing material costs and improving manufacturability.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Ease of operation

If separate flexible printed circuit boards are used for each data driver chip, then each chip can be connected independently, but the number of connections increases and yield decreases

Engineering Contradiction:

Improveconnection flexibilityVSAvoidnumber of connections

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent merges multiple data driver chips into cascaded groups where each group shares common connections to the timing controller through separate FPCs. This reduces the total number of independent connections required while maintaining the flexibility of separate FPC implementations.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS7903223B2Display panel module

Publication Date: 2011.03.08 AU OPTRONICS CORP

AI summary

In a display panel module, data driver chips are cascaded to one another and mounted on a display panel. A first flexible printed circuit (FPC) board is connected between a printed circuit board (PCB) and one end of the cascaded data driver chips for transmitting data signals to the data driver chips. A second FPC board is connected between the PCB and the cascaded data driver chips for transmitting power signals to the data driver chips.