Display Pixel Circuit With Shared Scan-Line Transistor Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic devices face challenges in efficiently controlling the operation of pixels due to non-uniform transistor characteristics and voltage drops caused by current flow in wires, particularly in high-resolution and high-frequency displays.
Innovation Solution
The electronic device incorporates a pixel structure comprising a light emitting diode and multiple transistors, including a first, second, and third transistor, with their control electrodes connected to a scan line providing a shared scan signal, allowing for precise control of data and driving voltages to enhance pixel operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pixel circuit structure is used, then the device complexity is low, but the uniformity of pixel operation deteriorates due to non-uniform transistor characteristics and voltage drops
Solution Approach 1:
The patent merges the control functions of multiple transistors (first, second, and third transistors) into a unified circuit architecture where their control electrodes are collectively connected to a single scan line. This integration allows synchronized control of multiple transistors within each pixel, improving operation uniformity while managing complexity through functional consolidation rather than independent control circuits.
Solution Approach 2:
The scan line serves multiple functions by simultaneously providing scan signals to the control electrodes of the first, second, and third transistors. This multi-functional approach allows a single signal line to control multiple circuit elements, reducing the need for separate control lines and improving uniformity without proportionally increasing device complexity.
2Productivity
If high-resolution and high-frequency displays are implemented, then the display quality is improved, but voltage drops caused by current flow in wires worsen
Solution Approach 1:
The patent applies preliminary action by pre-charging or pre-positioning voltages at the control electrodes of the transistors before the actual pixel operation begins. This ensures that even when current flows through the wire during high-frequency operation, the control voltages are already established, compensating for voltage drops and maintaining display performance at high refresh rates.
3Reliability
If multiple transistors with shared scan line control are used, then the uniformity of pixel operation is improved, but the device complexity increases
Solution Approach 1:
The patent merges the control functions of multiple transistors (first, second, and third transistors) into a unified circuit architecture where their control electrodes are collectively connected to a single scan line. This integration allows synchronized control of multiple transistors within each pixel, improving operation uniformity while managing complexity through functional consolidation rather than independent control circuits.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves the uniformity and efficiency of pixel operation, addressing issues of non-uniformity and voltage drops, thereby enhancing the display quality and performance of electronic devices.
Implementation Method 1
One pixel of the plurality of pixels may include a light emitting diode
Data Source
AI summary
An electronic device includes a display including a pixel that includes a light emitting diode, a first transistor having first and second electrodes and first and second control electrodes, the first electrode being electrically connected to a first voltage line that provides a first driving voltage and the second electrode being electrically connected to an anode of the light emitting diode, a second transistor electrically connected between the first control electrode of the first transistor and the second electrode of the first transistor, and a third transistor electrically connected between the second control electrode of the first transistor and a data line that provides a data signal. A control electrode of the second transistor and a control electrode of the third transistor are electrically connected to a scan line that provides a same scan signal.