OLED Sensing Apparatus Disturbing Circuit
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Solution Overview
Problem
In OLED display panels, performance decline over time leads to quantization and non-linear errors when converting analog sensing signals to digital data, resulting in image abnormalities such as abnormal lines displayed on the panel.
Innovation Solution
A sensing apparatus comprising a sensing circuit, an analog-to-digital converter (ADC) circuit, a disturbing circuit, and an output circuit, where the disturbing circuit generates a time-variant disturbance component to alter the sensing data output by the ADC, mitigating image abnormalities by smoothing digital data transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an ADC circuit is used to convert sensing signals to sensing data, then the sensing result can be converted to digital signal, but quantization and non-linear error are generated causing image abnormality
Solution Approach 1:
The patent introduces a disturbing circuit that deliberately adds time-variant disturbance components to the sensing data. This harmful noise is used to mask the quantization and non-linear errors from the ADC circuit, converting the harmful effect into a beneficial one that prevents observable image abnormalities while preserving the useful sensing information.
Solution Approach 2:
The disturbing circuit acts as an intermediary between the ADC circuit and the image processing circuit. It processes the sensing data by adding disturbance components, thereby mediating the transmission of data and preventing the direct propagation of quantization and non-linear errors to the final image output.
2Device complexity
If sensing data is directly processed without disturbance, then the circuit is simple, but image abnormal lines are displayed due to quantization error
Solution Approach 1:
Rather than attempting to eliminate quantization errors through complex correction circuits, the patent employs a simple disturbing circuit that adds time-variant noise to mask the errors. This approach maintains circuit simplicity while effectively preventing image abnormalities, converting the added complexity of noise generation into a beneficial solution.
3Adaptability or versatility
If ADC conversion is performed on sensing signal, then digital sensing data is obtained, but non-linear error occurs between sensing result and sensing data
Solution Approach 1:
The patent maintains the necessary ADC conversion capability for obtaining digital sensing data while introducing a disturbing circuit that adds time-variant disturbance components. This masking approach preserves the adaptability of signal conversion while compensating for the non-linear errors introduced by the ADC process, preventing observable image abnormalities.
Data Source
AI summary
The disclosure provides a sensing apparatus and an operation method thereof. The sensing apparatus includes a sensing circuit, an analog-to-digital converter (ADC) circuit, a disturbing circuit and an output circuit. The sensing circuit is configured to output a sensing signal indicating a sensing result of a sensing line of the display panel. The ADC circuit is coupled to the sensing circuit to receive the sensing signal and outputs sensing data related to the sensing signal. The disturbing circuit is coupled to the ADC circuit to receive the sensing data and generates a time-variant disturbance component to disturb the sensing data to generate disturbed data. The output circuit is coupled to the disturbing circuit to receive the disturbed data.