Sensing Node Pixel Circuit for Stable Bias and Read-Out
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Solution Overview
Problem
Existing technologies face challenges in effectively driving, testing, or sensing tunable elements and sensing elements in electronic devices, particularly in active-matrix pixel circuits, and efficiently reading out the results.
Innovation Solution
The electronic device comprises a sensing circuit with multiple transistors and a driving circuit with a compensation transistor, connected through a sensing node, allowing for the driving, testing, or sensing of electronic components and the effective read-out of results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a voltage source circuit with source follower amplifier is used to bias the tunable element, then the bias voltage can be maintained to compensate leak current, but the complexity of the circuit increases and makes driving, testing, and sensing operations difficult
Solution Approach 1:
The circuit is divided into distinct functional blocks: a sensing circuit with three transistors (first, second, and third transistors) and a separate driving circuit with a compensation transistor. This segmentation allows independent optimization of biasing functionality while simplifying the overall control architecture, making driving, testing, and sensing operations more manageable.
Solution Approach 2:
A sensing node is introduced as an intermediary connection point between the sensing circuit and the driving circuit. This sensing node facilitates signal transfer and enables independent operation of the two circuits, reducing the complexity of direct interconnections while maintaining bias voltage stability through the sensing mechanism.
2Adaptability or versatility
If the tunable element and sensing element are integrated in active-matrix pixels, then the device functionality is enhanced, but the difficulty of detecting and measuring driving, test, or sensing results increases
Solution Approach 1:
The measurement function is segmented from the pixel array by introducing a dedicated sensing circuit with three transistors. This separate sensing circuit provides a dedicated path for detecting and measuring the results of driving and testing operations, simplifying the measurement process while maintaining the integrated functionality of the active-matrix pixels.
Solution Approach 2:
The sensing node serves as an intermediary that connects the integrated tunable element and sensing element to the external driving circuit. This intermediary connection point enables easy access for detection and measurement of driving, test, or sensing results without disrupting the integrated pixel structure.
3Measurement precision
If multiple transistors are used in the sensing circuit, then the sensing capability is improved, but the device complexity increases
Solution Approach 1:
The sensing circuit is segmented into three specifically configured transistors, each performing a distinct function in the sensing process. This segmentation provides enhanced sensing capability through the collaborative operation of multiple transistors while keeping the overall circuit structure organized and manageable through clear functional division.
Data Source
AI summary
An electronic device is provided. The electronic device includes an electronic component, a sensing circuit, and a driving circuit. The sensing circuit is electrically connected to the electronic component through a sensing node. The sensing circuit includes a first transistor, a second transistor, and a third transistor. A control terminal of the first transistor is electrically connected to a terminal of the second transistor, and a terminal of the first transistor is electrically connected to another terminal of the second transistor. The third transistor is electrically connected to the first transistor. The driving circuit is electrically connected to the electronic component and the sensing circuit through the sensing node. The driving circuit includes a compensation transistor.