Memory Controller Reset Timing for Display Voltage Drops

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Solution Overview

Problem

Display devices experience booting errors due to instantaneous voltage drops in unstable power supply situations, particularly affecting the memory controller.

Innovation Solution

The display device includes a power source supply and a processor that detects voltage drops and resets the memory controller and main power source within a predetermined time to prevent errors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the display device operates in unstable power supply environments, then the device can be used in various regions, but instantaneous voltage drops occur causing memory controller booting errors

Engineering Contradiction:

Improveadaptability to various power supply environmentsVSAvoidmemory controller booting reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The processor performs preliminary detection of voltage drops and initiates reset actions before the memory controller can enter an error state. By detecting voltage anomalies and resetting the memory controller proactively within a predetermined time window, the system prevents booting errors before they occur, maintaining reliability while operating in unstable power environments

Inventive Principle:

Principle #10Preliminary action

2Reliability

If voltage detection and reset functions are added to prevent booting errors, then memory controller reliability improves, but device complexity increases

Engineering Contradiction:

Improvememory controller operation reliabilityVSAvoidcontrol system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The processor performs self-diagnosis by detecting voltage drops and automatically resets the memory controller without requiring external intervention or complex control circuits. This self-service mechanism maintains high reliability while minimizing additional hardware complexity, as the existing processor is utilized for detection and control functions

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The voltage detection and reset control functions are merged into the existing processor, combining multiple functions (power management, voltage monitoring, and controller reset) into a single integrated component. This approach improves reliability through comprehensive monitoring while avoiding the complexity of separate dedicated circuits for each function

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12488768B2Display device preventing memory controller error due to instant voltage drop, and method therefor

Publication Date: 2025.12.02 LG ELECTRONICS INC

AI summary

The present disclosure: display device comprising: a power source supply receiving a supply of power from an external power source; and a processor for detecting the voltage of the power supplied to the power source supply, detecting a voltage drop of the supplied power on the basis of the detected voltage of the power, and, if a voltage drop is detected, resetting a power source of a memory controller within predetermined time and resetting a main power source.