Pixel Sensing Circuit Location Compensation
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Solution Overview
Problem
Existing pixel sensing circuits in display devices face limitations in accurately compensating for characteristic differences among sensing channel circuits due to variations in temperature and location, leading to suboptimal picture quality and accuracy.
Innovation Solution
A pixel sensing circuit configuration with multiple sensing channel circuits and strategically placed reference sensing channel circuits, including at least one on each end and potentially in the middle or intervals, to generate and convert sensing values into data for compensation, improving sensing accuracy by reflecting circuit characteristics at different locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single reference sensing channel circuit is used for all sensing channel circuits, then device complexity is reduced, but measurement precision deteriorates due to location-dependent temperature variations
Solution Approach 1:
The patent divides the sensing channel circuits into multiple groups based on their physical locations (first through fourth groups corresponding to different regions of the display panel). Each group is associated with a dedicated reference sensing channel circuit, creating segmented reference circuits that can independently compensate for location-specific temperature variations. This segmentation resolves the contradiction by maintaining high measurement precision through localized references while managing device complexity through systematic organization.
Solution Approach 2:
The patent implements local quality by providing each sensing channel circuit group with a reference sensing channel circuit that has characteristics matching its specific location. The reference circuits are configured to compensate for temperature variations peculiar to their respective regions (e.g., edge regions vs. center regions of the display panel). This local matching ensures high sensing accuracy without requiring a single complex universal reference circuit.
2Measurement precision
If multiple reference sensing channel circuits are added to compensate for temperature variations, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent applies universality by designing reference sensing channel circuits that can serve multiple functions: they reference not only their own sensing channel circuits but also adjacent groups through shared reference voltage lines. For example, the third reference sensing channel circuit references both third and fourth sensing channel circuit groups. This multi-functionality reduces the total number of reference circuits needed while maintaining measurement precision across all groups.
Solution Approach 2:
The patent merges reference functions by allowing reference sensing channel circuits to serve multiple sensing channel circuit groups simultaneously. The fourth reference sensing channel circuit, for instance, references both fourth and fifth sensing channel circuit groups. This merging approach reduces device complexity by eliminating redundant reference circuits while preserving measurement precision through shared reference capabilities.
Data Source
AI summary
The present disclosure relates to a pixel sensing circuit and a panel driving device, and more particularly, to a pixel sensing circuit and a panel driving device for effectively compensating for differences of characteristics of sensing channel circuits depending on locations where the sensing channel circuits are disposed in an integrated circuit.