Cascaded Pixel Drive Circuit for Micro LED Display Panel
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Solution Overview
Problem
The high power consumption and complex cabling issues in micro LED display panels due to the large number of connections between pixel drive circuits and display driver circuits, leading to crowded cabling spaces and increased energy usage.
Innovation Solution
The implementation of a cascaded pixel drive circuit structure where multiple pixel drive circuits are connected in a cascading manner, reducing the number of cables and interfaces needed for image data and clock signal transmission, and allowing only necessary areas to receive image data for partial display, thereby minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each pixel drive circuit is directly connected to display driver circuit to receive image data and clock signal, then the transmission accuracy of image data is ensured, but a large quantity of connection cables are needed causing crowded cabling space and high power consumption
Solution Approach 1:
The pixel drive circuits are divided into multiple pixel areas, with each pixel area containing multiple pixel drive circuits connected in cascade. This segmentation reduces the number of direct connections to the display driver circuit while maintaining transmission accuracy within each segmented group.
Solution Approach 2:
The pixel area drive circuit serves as an intermediary between the display driver circuit and individual pixel drive circuits. It receives image data and clock signals from the display driver circuit and distributes them to multiple pixel drive circuits within the pixel area, reducing the overall cabling complexity.
2Reliability
If each pixel drive circuit is directly connected to display driver circuit, then the image data transmission is reliable, but the quantity of connection cables increases causing high power consumption
Solution Approach 1:
By segmenting pixel drive circuits into pixel areas with cascade connections, the total length and quantity of cables are reduced, thereby lowering power consumption while maintaining transmission reliability within each segment.
Solution Approach 2:
Multiple pixel drive circuits within a pixel area share common connection cables to the pixel area drive circuit. This merging of connections reduces the total cable quantity and associated power consumption compared to individual direct connections for each pixel drive circuit.
3Productivity
If a large quantity of I/O interfaces are provided for display driver circuit, then all pixel drive circuits can receive image data simultaneously, but the device complexity and cabling requirements increase
Solution Approach 1:
The pixel drive circuits are organized into multiple pixel areas, each with its own pixel area drive circuit. This segmentation allows the display driver circuit to connect to multiple pixel areas through fewer I/O interfaces while still enabling simultaneous image data distribution to all pixel areas.
Solution Approach 2:
The pixel area drive circuit performs multiple functions: it receives image data and clock signals from the display driver circuit, distributes them to multiple pixel drive circuits within the pixel area, and manages the cascade connection structure. This multi-functionality reduces the need for dedicated I/O interfaces for each pixel drive circuit.
Data Source
AI summary
A display panel (11) with a low signal transmission power and large cabling space, and a semiconductor display apparatus including the display panel (11) are provided. The display panel (11) includes pixel areas (DB) that are of N rows and M columns and that are connected in a matrix, each pixel area (DB) includes pixel drive modules that are of Q rows and P columns and that are connected in a matrix, each pixel drive circuit (PD) is connected to at least one pixel unit (P), and the pixel drive circuit (PD) drives, based on to-be-displayed image data, the pixel unit (P) to emit light to display an image. All pixel areas (DB) in any column of the pixel areas (DB) are connected to data interfaces (DI) in a same group, and pixel areas (DB) in different columns are connected to data interfaces (DI) in different groups.