Display Pixel Circuit With Pulse-Width Gray Level Control
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Solution Overview
Problem
Existing display panels lack the ability to express a wide range of gray levels and are not highly convenient or reliable, particularly in varying lighting conditions.
Innovation Solution
The display panel incorporates a pixel circuit with a first switch and a first transistor, which is supplied with selection, image, and pulse width control signals to determine the output potential and period, allowing for a wide range of gray level expression, even in dark or bright environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional display panel uses simple pixel circuits without pulse width control, then the device complexity is low, but the ability to express a wide range of gray levels is limited
Solution Approach 1:
The pixel circuit employs dynamic control through pulse width modulation where the second gate electrode receives a pulse width control signal that dynamically adjusts the transistor's operating state. This allows the circuit to adaptively control the output potential's duration, enabling a wide range of gray levels to be expressed by varying the pulse width rather than requiring complex static circuit configurations.
Solution Approach 2:
The invention changes the temporal parameter of the output potential by introducing pulse width control. The second gate electrode is supplied with a pulse width control signal that determines the period during which the output potential is supplied. This parameter change approach allows gray levels to be controlled by adjusting time duration rather than requiring proportional changes in voltage or current, simplifying the overall circuit structure while expanding gray level expression capability.
2Reliability
If the display panel uses fixed pixel circuits without adaptive control, then the manufacturing precision is easier to achieve, but the reliability in varying lighting conditions deteriorates
Solution Approach 1:
The pixel circuit incorporates feedback control through the pulse width control signal that is supplied to the second gate electrode based on the output potential's characteristics. This feedback mechanism allows the circuit to automatically adjust the pulse width to compensate for variations in lighting conditions, ensuring reliable display performance across different environmental conditions without requiring complex external control systems.
Solution Approach 2:
The display panel employs dynamic adaptive control where the pulse width control signal continuously adjusts the transistor's conduction period based on real-time operating conditions. This dynamic adjustment enables the display to maintain optimal performance in varying lighting conditions by adapting the output potential's duration, thereby improving reliability without requiring overly complex fixed circuit designs.
Data Source
AI summary
A novel display panel that is highly convenient or reliable is provided. The display panel includes a pixel comprising a pixel circuit and a display element, and the display element is electrically connected to the pixel circuit. The pixel circuit is supplied with a selection signal, an image signal, and a pulse width control signal, supplies an output potential, and determines, on the basis of the pulse width control signal, a period during which the output potential is supplied. The pixel circuit includes a first switch and a first transistor. The first switch supplies the image signal on the basis of the selection signal and determines the output potential on the basis of the image signal. The first transistor includes a first and second electrode, and a first gate electrode. The output potential is output from the first electrode, and the first gate electrode is supplied with the image signal.