Flexible Display Power Trunk Wiring Segmentation

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Solution Overview

Problem

In bi-fold flexible display devices, high power supply voltage drops and voltage variations occur between the central and edge regions due to the distribution of power supply voltage lines.

Innovation Solution

The implementation of a display device configuration with separate high power supply voltage trunk wiring lines for each display region, connected via a conductive layer in the curved portion, ensures consistent voltage distribution across the device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If high power supply voltage is supplied from both end sides of spread screens, then power supply coverage is improved, but voltage drop increases toward the central portion

Engineering Contradiction:

Improvepower supply coverageVSAvoidvoltage drop

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The power supply system is segmented into multiple independent power supply units, each serving a specific display region. This segmentation allows each unit to maintain stable voltage output without the cumulative voltage drop that occurs when power is supplied from distant ends across the entire spread screen.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each display region is provided with its own dedicated power supply voltage lines and pixel circuits, creating local power supply quality. This ensures that each region receives optimal power supply with minimal voltage drop, rather than relying on power lines extending from distant end sides.

Inventive Principle:

Principle #3Local quality

2Reliability

If power supply voltage lines are distributed across the display device, then power supply coverage is improved, but voltage variation between regions increases

Engineering Contradiction:

Improvepower supply coverageVSAvoidvoltage consistency

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The display device is divided into multiple display regions, each with its own power supply unit. This segmentation ensures that voltage is supplied locally to each region, maintaining consistent voltage levels across all regions without the variations that occur in distributed long-distance power lines.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

By providing separate power supply voltage lines to each display region, the system creates equipotential conditions across different regions. Each region operates at the same stable voltage potential, eliminating voltage variations between regions.

Inventive Principle:

Principle #12Equipotentiality

Data Source

PatentUS11751444B2Display device

Publication Date: 2023.09.05 SHARP KK

AI summary

A flexible display device includes a first display region, a second display region, a curved portion, a first high power supply voltage trunk wiring line, and a second high power supply voltage trunk wiring line. A plurality of first high power supply voltage lines branch from the first high power supply voltage trunk wiring line and extend to the first display region, a plurality of second high power supply voltage lines branch from the second high power supply voltage trunk wiring line and extend to the second display region, and the first high power supply voltage trunk wiring line and the second high power supply voltage trunk wiring line are electrically connected to each other via a first curved portion conductive layer formed in the curved portion.