Pixel Circuit Shared Switch Channel Width Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing organic light-emitting display devices face challenges in reducing power consumption due to IR drops in the circuit layers, which increase the pixel driving voltage and overall power consumption.
Innovation Solution
A pixel circuit design that includes a first driving element, a light emitting element, and switch elements with varying channel widths, where the shared switch element connected to multiple sub-pixels has a larger channel width than the individual switch element, reducing IR drops and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pixel driving voltage is increased to compensate for IR drops in circuit layers, then the voltage supply reliability is improved, but the power consumption increases
Solution Approach 1:
The patent applies different channel widths to different switch elements based on their specific functional requirements and current load characteristics. The first switch element has a first channel width while the second switch element has a second channel width, optimizing each component's electrical performance for its specific role in the circuit, thereby reducing overall IR drops without increasing power consumption
2Reliability
If the channel width of switch elements is increased to reduce IR drops, then the voltage supply reliability is improved, but the device area increases
Solution Approach 1:
Instead of uniformly increasing channel widths across all switch elements, the patent selectively assigns different channel widths based on local requirements. This localized optimization reduces the total area occupied by switch elements while maintaining voltage supply reliability where it is most critical
Solution Approach 2:
The patent introduces controllable switch elements that can dynamically adjust their effective resistance through gate voltage control. This dynamic capability allows the circuit to achieve low IR drops only when needed, rather than requiring permanently large channel widths that would consume excessive area
3Ease of operation
If the channel width of individual switch elements is increased, then the switching performance is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent implements different channel widths for different switch elements based on their specific switching requirements. This localized differentiation optimizes switching performance for each component's role while maintaining a relatively simple manufacturing process by only requiring variations in one parameter (channel width) rather than complete redesign of switch element structures
Data Source
AI summary
A pixel circuit and a display panel including the same are disclosed. The display panel includes: an individual switch element configured to supply a pixel driving voltage to a first sub-pixel in response to a gate signal; and a shared switch element configured to supply the pixel driving voltage to second and third sub-pixels in response to the gate signal. Each of the individual switch element and the shared switch element is a transistor having a channel width. The channel width of the shared switch element is larger than the channel width of the individual switch element.