Light-emitting Display Noise Removal Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Light-emitting displays, such as OLEDs, face challenges in maintaining image quality due to degradation of sub-pixels and transistors, which is not effectively compensated for by existing compensation circuits, leading to noise interference during sensing operations.
Innovation Solution
A light-emitting display system comprising a display panel with a first circuit for supplying data voltage and a second circuit for sensing and noise removal, which outputs a noise removing voltage during the blanking interval to cancel out noise on the sensing line, allowing for accurate sensing and compensation of sub-pixel degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing compensation circuits are used for sensing operations, then sub-pixel degradation can be compensated for, but noise interference occurs during sensing operations
Solution Approach 1:
The patent applies preliminary action by performing a sensing operation during the blanking interval (before the active display period) to detect noise on the sensing line in advance. This preliminary sensing allows the system to identify noise characteristics before they interfere with actual pixel sensing during the active period, enabling proactive noise compensation rather than reactive correction.
Solution Approach 2:
The patent implements feedback by using the sensing line to detect voltage levels that represent noise during the blanking interval, then feeding this information back to adjust subsequent sensing operations. The circuit uses the detected noise characteristics to compensate for interference in real-time, creating a closed-loop system that continuously monitors and corrects noise affecting pixel sensing accuracy.
2Reliability
If sensing operations are performed during the active period, then real-time compensation is achieved, but display performance is degraded due to interference
Solution Approach 1:
The patent moves the sensing operation to the blanking interval, performing it in advance during a period when no image data is being displayed. This preliminary sensing during the blanking interval allows the system to prepare compensation values without interrupting the active display period, ensuring that both compensation accuracy and display performance are maintained simultaneously.
Solution Approach 2:
The patent employs periodic action by conducting sensing operations at regular intervals during the blanking interval of each frame cycle. This periodic sensing approach allows the system to continuously update noise compensation values without disrupting the continuous display output during active periods, maintaining both reliability and productivity through rhythmic, non-intrusive measurement cycles.
3Object-affected harmful factors
If noise removing voltage is output during the active period, then noise cancellation is achieved, but data signal transmission is interfered with
Solution Approach 1:
The patent applies preliminary action by outputting the noise removing voltage during the blanking interval before the active period begins. This timing ensures that noise cancellation is established in advance, creating a clean electrical environment for subsequent data signal transmission during the active period without causing interference to pixel driving operations.
Solution Approach 2:
The patent uses periodic action by synchronizing the noise removing voltage output with the blanking interval timing signals. This periodic synchronization ensures that noise cancellation occurs rhythmically at appropriate moments when data transmission is not occurring, eliminating conflict between noise removal activities and data signal transmission requirements.
Data Source
AI summary
A light-emitting display includes a display panel, a first circuit, and a second circuit. The display panel comprises a pixel. The first circuit supplies a data voltage to a data line for the pixel. The second circuit performs a sensing operation for sensing a sensing line for the pixel and outputs a voltage required for the sensing operation, and outputs a noise removing voltage for cancelling out noise formed on the sensing line during the sensing operation.