Display Pixel Circuit with Shared Transistors for VRR Flicker
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices using variable refresh rate (VRR) and separated compensation driving (SCD) face issues such as flicker phenomenon and image quality unevenness, which are exacerbated by the increased number of transistors and voltages required in the pixel design.
Innovation Solution
A display device design where at least two pixels share at least two transistors, reducing the overall transistor count in each pixel, and incorporating a specific transistor configuration and shared transistor connections to enhance efficiency and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If variable refresh rate driving and separated compensation driving are adopted to improve driving efficiency and minimize power consumption, then power consumption is reduced, but flicker phenomenon and image quality unevenness occur
Solution Approach 1:
The patent combines the compensation driving function and data writing function into a single time period, eliminating the need for separate compensation driving period. This merging approach reduces the overall driving time and power consumption while avoiding the flicker phenomenon and image quality unevenness caused by separate compensation driving.
Solution Approach 2:
The patent implements dynamic driving where the gate signal is applied only during the data writing period rather than continuously during both compensation and data writing periods. This dynamic approach reduces power consumption while maintaining image quality uniformity by eliminating unnecessary driving during compensation period.
2Productivity
If variable refresh rate driving and separated compensation driving are adopted to improve driving efficiency, then driving efficiency is improved, but the number of transistors and voltages required increases
Solution Approach 1:
The patent merges the compensation driving and data writing functions into a single period, which reduces the number of transistors and voltage lines required. Specifically, the shared transistor configuration allows multiple pixels to share common components, reducing overall device complexity while maintaining driving efficiency.
Solution Approach 2:
The patent implements a universal transistor configuration where transistors serve multiple functions - both compensation driving and data writing operations use the same transistor infrastructure. This multi-functionality reduces the total number of transistors needed while maintaining high driving efficiency.
3Measurement precision
If the number of transistors in each pixel is reduced to increase display resolution, then display resolution is improved, but transistor sharing complexity increases
Solution Approach 1:
The patent merges transistor functions across adjacent pixels, where transistors shared between pixels are configured to operate in both compensation driving and data writing modes. This merging increases display resolution by reducing total transistor count while the systematic configuration approach manages the sharing complexity.
Solution Approach 2:
The patent segments the pixel structure into shared and dedicated components, where certain transistors are allocated for shared use across multiple pixels while others remain dedicated. This segmentation allows for reduced transistor count per pixel (increasing resolution) while maintaining manageable complexity through systematic allocation.
Data Source
AI summary
A display device includes pixels, each including a first transistor including a gate connected to a first node, a source connected to a second node, and a drain connected to a third node, a second transistor including a gate configured to receive a first gate signal, a source configured to receive a data voltage, and a drain connected to a fourth node, a third transistor including a gate configured to receive a second gate signal, a source connected to the third node, and a drain connected to the first node, a storage capacitor including a first terminal connected to the first node and a second terminal connected to the fourth node, and a light emitting element including a first terminal connected to a fifth node and a second terminal configured to receive a second power voltage. At least two of the pixels share at least two transistors.