Video Controller Abnormal Signal Detection for OLED Panel Protection
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Solution Overview
Problem
Existing OLED display devices fail to prevent abnormal image displays during mode conversion, abnormal signal input, and no-signal input, which can damage the display panel and lead to shortened lifespan due to unmonitored errors in gate control signals.
Innovation Solution
A display device comprising a video controller that detects abnormal signal inputs and no-signal inputs, generating substitute video and control signals to ensure a normal end of frame, and a timing controller that outputs these signals to prevent abnormal displays, including a signal detector, clone signal generator, abnormal signal processor, and signal output unit to manage mode conversions and abnormal inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If mode conversion is performed in OLED display device, then power consumption is reduced, but abnormal image display occurs and panel damage may result
Solution Approach 1:
The patent applies preliminary action by detecting abnormal signals and generating substitute video data before the frame is completely displayed. The video controller monitors input signals during mode conversion and prepares replacement data in advance to prevent abnormal images from being displayed, thus protecting the panel while maintaining power-saving benefits.
Solution Approach 2:
The patent uses an intermediary approach by introducing a video controller that acts as a mediator between the signal input and display panel. This controller detects abnormal signals and inserts substitute video data as an intermediary layer, preventing direct transmission of harmful signals to the panel while enabling safe mode conversion.
2Device complexity
If abnormal signal input is not monitored, then device complexity is reduced, but abnormal image display and panel damage occur
Solution Approach 1:
The patent applies self-service by enabling the video controller to autonomously detect abnormal signals and generate appropriate substitute video data without external intervention. The system monitors its own input signals and automatically corrects abnormalities, maintaining image quality without requiring additional complex external monitoring systems.
Solution Approach 2:
The patent implements feedback by continuously monitoring input signals and using the detection results to control video data output. The video controller receives feedback from signal detection, determines whether substitution is needed, and adjusts the video data accordingly, creating a closed-loop system that maintains reliability.
3Reliability
If substitute video data is generated during abnormal input, then frame completion is ensured, but processing time increases
Solution Approach 1:
The patent applies skipping by rapidly processing and substituting abnormal video data within the frame timing constraints. The video controller quickly detects abnormalities and replaces only the necessary portions of video data, rushing through the correction process to complete frames on time without significant delay to overall display performance.
Data Source
AI summary
Disclosed is a display device which facilitates to prevent an abnormal display during a driving mode conversion, an abnormal signal input, and a no-signal input, and a method for driving the same, wherein the display device comprises a video controller for detecting an abnormal signal input and no-signal input by monitoring video data and control signals inputted from the external; and generating video data and control signals according to the abnormal signal input and no-signal input so as to enable a normal end of a frame; a timing controller for arranging and outputting the video data, supplied from the video controller, for every frame unit; and generating and outputting control signals for controlling a gate driver and a data driver by the use of timing synchronous signals; and a display panel for displaying image by the use of input video data.