Source Driver IC Fault Protection for Display Pixels
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Solution Overview
Problem
Display devices face issues with image quality deterioration due to changing pixel characteristics over time or environmental conditions, and abnormal signals exceeding the input range can damage sensing circuits and alter pixels.
Innovation Solution
A sensing device and source driver integrated circuit that include a sensing unit to generate pixel sensing data and a fault processing unit to detect abnormal signals, preventing damage by generating a fault signal and controlling the supply of data voltage accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensing circuit receives sensing signals through sensing lines to detect pixel characteristics, then the image quality is improved through compensation, but the sensing circuit may be damaged by abnormal signals exceeding input range
Solution Approach 1:
A fault processing unit is introduced as an intermediary component between the sensing line and the sensing circuit. This unit monitors signals on the sensing line and generates fault signals when abnormal conditions are detected, preventing damaged signals from reaching and damaging the sensing circuit while allowing normal sensing operations to proceed
Solution Approach 2:
The fault processing unit performs preliminary detection and protection by monitoring sensing line signals before they can damage the sensing circuit. By detecting abnormal signals in advance and generating fault signals, the system prevents harmful effects before they occur to the main sensing components
2Reliability
If the sensing circuit converts sensing signals to sensing data for pixel characteristic detection, then the image quality is improved through compensation, but pixel alteration may occur due to distortion of sensing data from abnormal signals
Solution Approach 1:
The fault processing unit acts as a mediator that intercepts and identifies abnormal signals on the sensing line before they can be converted into distorted sensing data. By generating fault signals for abnormal conditions, it prevents the conversion of corrupted sensing signals into erroneous pixel characteristic data that would cause pixel alteration
Solution Approach 2:
The fault processing unit provides feedback about the status of sensing line signals by generating fault signals when abnormalities are detected. This feedback mechanism allows the system to recognize and respond to problematic sensing conditions, preventing the propagation of distorted data that would lead to pixel alteration
Data Source
AI summary
A source driver integrated circuit of the present invention comprises: a sensing circuit for receiving a sensing signal for pixels through a sensing line connected to the pixels, converting the sensing signal so as to generate sensing data, and generating a fault signal if an abnormal signal that exceeds an input range is received from the sensing line; and a data driving circuit for receiving, from the data processing circuit, image data which is processed to be compensated according to the sensing data and a data control signal in which the fault signal is reflected, converting the image data so as to generate data voltage, and controlling supply of the data voltage to the pixels according to the data control signal.