Pixel Circuit Peripheral Compensation Aperture Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional OLED display panels face poor brightness uniformity due to varying threshold voltages of driving transistors, leading to increased material aging and reduced service life, and the use of pixel compensation circuits decreases the aperture ratio and increases costs.
Innovation Solution
A pixel circuit design with driving circuits corresponding to data lines and compensating circuits corresponding to gate lines, where each driving circuit is placed in the peripheral area of the display panel near data lines and each compensating circuit is placed near gate lines, allowing for controlled output of reference signals to driving circuits to improve brightness uniformity and aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a pixel compensation circuit is disposed in each pixel to eliminate threshold voltage influence, then brightness uniformity is improved, but the aperture ratio decreases and production costs increase
Solution Approach 1:
The patent extracts the compensation circuit from the pixel unit and relocates it to the peripheral area of the display panel. This separation removes the compensation circuitry that was previously occupying space within each pixel, thereby restoring the aperture ratio while maintaining the brightness uniformity compensation function through the relocated circuit's operation on gate lines.
Solution Approach 2:
The patent transitions the compensation circuit from a two-dimensional placement within the pixel matrix to a peripheral location in the display panel. This spatial reconfiguration allows the compensation circuit to serve multiple pixels through gate line control without occupying individual pixel areas, thus resolving the conflict between compensation functionality and aperture ratio.
2Manufacturing precision
If a pixel compensation circuit is disposed in each pixel to eliminate threshold voltage influence, then brightness uniformity is improved, but production costs increase
Solution Approach 1:
The patent extracts the compensation circuit from individual pixel units and consolidates it in the peripheral area. This reduction in the number of discrete compensation circuits per pixel decreases the overall component count and simplifies the manufacturing process, leading to lower production costs while preserving the brightness uniformity compensation capability.
Solution Approach 2:
The relocated compensation circuit serves multiple pixels simultaneously through its connection to gate lines, eliminating the need for separate compensation circuits in each pixel. This multi-functional design reduces component quantity and manufacturing complexity, thereby lowering production costs while maintaining compensation effectiveness across all pixels.
3Manufacturing precision
If pixel compensation circuits are disposed in each pixel, then brightness uniformity is improved, but the number of TFT increases
Solution Approach 1:
The patent extracts the compensation circuit functionality from individual pixel TFT structures and implements it through a centralized peripheral circuit that controls gate lines. This extraction reduces the number of TFT components within each pixel while maintaining the compensation function, thereby simplifying the overall device structure.
Solution Approach 2:
The peripheral compensation circuit serves multiple pixels through its gate line connections, replacing the need for separate compensation TFTs in each pixel. This universal approach reduces the total number of TFT components while achieving the same brightness uniformity compensation effect across all pixels.
Data Source
AI summary
Disclosed are a pixel circuit, a display panel and a display device. The pixel circuit includes driving circuits which are in one-to-one correspondence to data lines, each driving circuit being disposed in a peripheral area of a display panel; compensating circuits which are in one-to-one correspondence to gate lines, each compensating circuit being disposed in a peripheral area of the display panel; and light emitting devices. Each compensating circuit outputs a first reference signal or a second reference signal to the corresponding driving circuit. Each driving circuit drives a corresponding light emitting device to emit light through a signal from the corresponding compensating circuit and a data signal from the corresponding data line. The pixel circuit of the present disclosure can improve the aperture ratio of a pixel unit.