Display Device Voltage Sensing Noise Correction
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Solution Overview
Problem
Existing display panel compensation technologies are affected by external noise, leading to inaccurate digital sensing values that compromise the effectiveness of external compensation, thereby impacting the display effect.
Innovation Solution
A display device and method that includes a sampling circuit connected to sensing lines and a reference voltage providing circuit, which acquires both voltage sampling values and reference voltages to correct the sampling values, thereby removing noise and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external compensation is performed on the display panel, then the display effect is improved, but the sensing values are affected by external noise leading to inaccuracy
Solution Approach 1:
A reference voltage providing circuit is introduced as an intermediary component between the sensing lines and the sampling circuit. This reference voltage serves as a mediator to eliminate the influence of external noise on the sensing values, thereby improving measurement precision while maintaining the external compensation functionality for display effect enhancement
Solution Approach 2:
The system implements feedback by sampling the reference voltage and using it to correct the sensing values obtained from the sensing lines. The processing circuit uses the reference voltage sampling values to compensate for noise in the original sensing values, creating a feedback loop that improves accuracy while preserving the display compensation effect
2Measurement precision
If sampling circuit acquires both sensing line voltage and reference voltage, then sensing value accuracy is improved, but device complexity increases
Solution Approach 1:
The sampling circuit is designed with multi-functionality to handle both sensing line voltage sampling and reference voltage sampling through the same analog-to-digital converter. This universal approach allows the circuit to acquire multiple types of voltage data using a single sampling mechanism, improving measurement precision without proportionally increasing device complexity
Solution Approach 2:
The reference voltage providing circuit is integrated with the sampling circuit architecture, merging the reference voltage generation and sampling functions into a unified circuit structure. This integration allows the system to obtain both sensing line voltages and reference voltages through a coordinated operation, improving accuracy while minimizing the increase in device complexity
Data Source
AI summary
The present disclosure provides a display device and a circuit and method for acquiring voltages, and belongs to the field of display technologies. The display device includes: a display panel including a plurality of sub-pixels and a plurality of sensing lines, each of the sub-pixels being connected to one of the sensing lines; a reference voltage providing circuit configured to provide a reference voltage; a sampling circuit electrically connected to the sensing lines and the reference voltage providing circuit, respectively, and configured to acquire a voltage on each sensing line to obtain a first sampling value, and acquire the reference voltage provided by the reference voltage providing circuit to obtain a second sampling value; and a processing circuit electrically connected to the sampling circuit, and configured to correct the first sampling value based on the second sampling value and the reference voltage.