Display Panel Pixel Capacitor Sharing for High Resolution
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Solution Overview
Problem
In display devices driven in simultaneous light emission methods, the need to compensate for threshold voltage and initialize electrodes increases pixel area size, making high resolution and high integration challenging due to additional circuit components.
Innovation Solution
A display panel design where adjacent pixels share a capacitor connected to the data line, reducing pixel area size and improving capacitance without increasing the pixel area, allowing for high resolution and high integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional circuit components (transistor, capacitor) are added for threshold voltage compensation and electrode initialization, then display quality is improved, but pixel area size increases
Solution Approach 1:
The patent merges the capacitor of the first pixel with the capacitor of the second pixel, allowing two adjacent pixels to share a single capacitor. This is achieved by configuring the capacitor to be electrically connected to both pixels through their respective switching transistors, thereby reducing the total component count and pixel area while maintaining the necessary charge storage function for both pixels during simultaneous light emission operation
Solution Approach 2:
The shared capacitor serves multiple functions: it acts as the holding capacitor for the first pixel to maintain its drive current, simultaneously serves as the holding capacitor for the second pixel, and enables both pixels to operate in simultaneous light emission mode. This multi-functionality reduces the overall circuit complexity and pixel area requirement
2Productivity
If pixel area is reduced for high resolution, then integration density is improved, but capacitor capacitance may be insufficient
Solution Approach 1:
By combining the capacitor resources of two pixels into a single shared capacitor, the effective capacitance available to each pixel is maintained even though the physical area per pixel is reduced. The shared capacitor stores charge for both pixels alternately, ensuring sufficient capacitance for proper display operation in simultaneous light emission mode
Data Source
AI summary
A display panel includes: a first scan line, a second scan line, and a third scan line; a data line; a first pixel in a first pixel area, connected to the first scan line and the second scan line, and connected to the data line through a first capacitor; and a second pixel in a second pixel area, connected to the second scan line and the third scan line, and connected to the data line through the first capacitor.