Display Backplane Shared Drivers Time-Division Multiplexing
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Solution Overview
Problem
The size of device drivers in conventional displays becomes a limiting factor for pixel density, making it difficult to create high resolution displays without increasing the size and cost of the display.
Innovation Solution
The implementation of a system where multiple light sources share a device driver, with each light source being paired with the device driver at different time intervals, allowing for higher resolution displays without the need for larger device drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each light source is paired with a dedicated device driver to ensure reliable control, then control reliability is improved, but device complexity and area increase
Solution Approach 1:
A single device driver is designed to control multiple light sources sequentially through time-division multiplexing. The driver alternates between different light sources within a frame period, with each light source receiving dedicated control during its assigned time slot. This multi-functional approach maintains reliable control while reducing the total number of drivers needed.
Solution Approach 2:
The system implements periodic switching between multiple light sources controlled by a single device driver. Within each frame period, the driver periodically selects different light sources based on time intervals, ensuring each light source receives appropriate control signals during its active period while sharing the same driver resource.
2Manufacturing precision
If the number of device drivers is increased to match the number of light sources for high resolution displays, then pixel density is improved, but manufacturing cost increases
Solution Approach 1:
Device drivers are designed as universal components capable of controlling multiple light sources through time-division multiplexing. This reduces the total number of drivers required for high-resolution displays, lowering manufacturing costs while maintaining the ability to control each pixel independently for high pixel density.
Solution Approach 2:
Multiple light source control functions are merged into a single device driver through time-division multiplexing. The driver combines control signals for multiple light sources into one component, reducing the overall number of drivers needed and thereby reducing manufacturing complexity and cost for high-resolution displays.
3Manufacturing precision
If the number of device drivers is increased to match the number of light sources for high resolution displays, then pixel density is improved, but the display size must be increased
Solution Approach 1:
Each device driver is designed to universally control multiple light sources through time-division multiplexing, allowing a reduced number of drivers to support high pixel density without requiring proportional increases in display area. The compact driver design enables higher resolution within the same physical footprint.
Solution Approach 2:
The system adds the time dimension to the control architecture, using time-division multiplexing to control multiple light sources sequentially. This temporal dimension allows a single driver to manage multiple pixels, achieving high pixel density without proportionally increasing the spatial area occupied by drivers.
4Device complexity
If multiple light sources share a single device driver through time-division multiplexing, then device complexity is reduced, but control precision may deteriorate
Solution Approach 1:
The device driver implements periodic switching between multiple light sources with dedicated time slots within each frame period. During each light source's active time interval, the driver provides focused control with appropriate timing precision, ensuring that control accuracy is maintained despite sharing the driver among multiple light sources.
Solution Approach 2:
The system dynamically allocates control time slots to different light sources based on their positioning and activation requirements. The driver adapts its switching timing and duration for each light source, maintaining precise control by adjusting the temporal parameters dynamically rather than using fixed uniform time divisions.
Data Source
AI summary
A display with multiple light sources sharing a device driver is disclosed. In one embodiment of the present invention a display includes a first device driver, a first light source, a second light source and a first light-source selection circuit which is coupled to the first device driver, the first light source and the second light source. The first light-source selection circuit is configured to pair the first device driver with the first light source during a first time interval and to pair the first device driver with the second light source in a second time interval.