Display Power Module Overload Threshold Switching After Module Failure

Solution Overview

Problem

Large-screen display devices with multiple power modules face increased manufacturing costs and volume due to the need for each power module to cover the entire display, and there is a risk of failure leading to unstable power supply.

Innovation Solution

A display device with a first and second power module, where the first power module cuts off output when an overload criterion is exceeded and identifies an abnormal state in the second power module by changing the overload threshold, and a processor reduces display luminance and senses the abnormal state of the second power module to manage power distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If each power module is designed to cover the full rating of the large-screen display device, then the display device can maintain stable power supply even when one power module fails, but the volume and manufacturing cost of each power module increases

Engineering Contradiction:

Improvepower supply stabilityVSAvoidpower module volume

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The power supply system is divided into multiple independent power modules (first power module and second power module), each capable of independently supplying power to the display device. This segmentation allows the system to maintain reliability while reducing the size of individual modules, as each module only needs to handle a portion of the total power requirement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces dynamic threshold adjustments for overload detection based on the operational state of power modules. When one power module is detected to be abnormal, the overload threshold of the other power module is adjusted to accommodate the increased power demand, allowing flexible parameter adaptation without requiring oversized power modules.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If each power module is designed to cover the full rating of the large-screen display device, then the display device can maintain stable power supply even when one power module fails, but the manufacturing cost increases

Engineering Contradiction:

Improvepower supply stabilityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The power supply system is divided into multiple independent power modules (first power module and second power module), each capable of independently supplying power to the display device. This segmentation allows the system to maintain reliability while reducing the size of individual modules, as each module only needs to handle a portion of the total power requirement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces dynamic threshold adjustments for overload detection based on the operational state of power modules. When one power module is detected to be abnormal, the overload threshold of the other power module is adjusted to accommodate the increased power demand, allowing flexible parameter adaptation without requiring oversized power modules.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If the first power module operates at full capacity when the second power module fails, then the display device can maintain normal operation, but the first power module may be overloaded and cause damage

Engineering Contradiction:

Improvedisplay operation continuityVSAvoidpower module safety

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where the first power module detects the abnormal state of the second power module and adjusts its overload threshold accordingly. This feedback loop allows the first power module to safely increase its output capacity when needed while maintaining protection against genuine overloads, ensuring both operational continuity and component safety.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The overload threshold of the first power module is made dynamic rather than fixed. It automatically adjusts based on the operational status of the second power module, allowing the system to adapt to changing conditions and optimize the balance between productivity and reliability in real-time.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11915628B2Display device including overload protection circuit

Publication Date: 2024.02.27 SAMSUNG ELECTRONICS CO LTD

AI summary

A display device according to an embodiment includes a display, a first power module that outputs a first power, and a second power module that outputs a second power. The first power and the second power are supplied to the display. The first power module is configured to cut off the first power when an amount of input current exceeds an overload criterion, to identify whether the second power module is abnormal based on the second power, and to change the overload criterion from a first threshold current amount to a second threshold current amount that exceeds the first threshold current amount, in an abnormal state of the second power module.