Drive Circuit Overcurrent Correction for Display Panel Protection
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Solution Overview
Problem
The existing overcurrent protection circuits in boost chips and power management chips often fail to turn off current outputs in time, leading to panel burnout and significant security risks in liquid crystal display panels.
Innovation Solution
A drive circuit comprising a current detector and a timing controller that adjusts the internal overcurrent setting value of a second chip, allowing for timely shutdown of excessive current outputs, thereby preventing panel burnout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If overcurrent protection circuits are implemented in boost chip and power management chip, then panel burnout is prevented, but the response time is too slow causing delayed shutdown
Solution Approach 1:
The patent introduces a current detector as an intermediary component that monitors the current signal from the power management chip and communicates with the boost chip through a timing controller. This intermediary detection mechanism enables the boost chip to obtain real-time current information and adjust its output accordingly, achieving timely shutdown without requiring the power management chip's internal protection circuits to respond, thus resolving the contradiction between protection reliability and response speed.
2Length of moving object
If frame size is reduced using GDL architecture, then display frame length is minimized, but overcurrent protection becomes less reliable
Solution Approach 1:
The patent implements a feedback mechanism where the current detector continuously monitors the current signal from the power management chip and feeds this information to the timing controller, which then adjusts the boost chip's operation. This closed-loop feedback enables real-time overcurrent detection and response, enhancing protection reliability in the GDL architecture where the boost chip and shift register chip are separated, thus resolving the contradiction between frame size reduction and protection reliability.
Data Source
AI summary
Embodiments of the present disclosure provide a drive circuit and a method for correcting internal overcurrent setting value thereof. The first current signal output from the first chip is converted into the second current signal which is configured to adjust the internal overcurrent setting value of the second chip by the timing controller.